北京市地方標(biāo)準編號：DB11/T1446-2017備案號：56090-2017回彈法、超聲回彈綜合法檢測泵送混凝土抗壓強度技術(shù)規(guī)程實施聯(lián)合發(fā)布2017北京北京市地方標(biāo)準回彈法、超聲回彈綜合法檢測泵送混凝土抗壓強度技術(shù)規(guī)程編號：DB11/T1446-2017備案號：56090-2017主編部門：北京市建設(shè)工程安全質(zhì)量監(jiān)督總站批準部門：北京市質(zhì)量技術(shù)監(jiān)督局3 12術(shù)語、符號 22.1術(shù)語 22.2符號 23回彈儀和超聲波檢測儀 43.1回彈儀技術(shù)要求 43.2超聲波檢測儀技術(shù)要求 54檢測技術(shù) 74.1一般規(guī)定 74.2回彈值測量 84.3碳化深度值測量 94.4超聲測量 95回彈值和聲速值計算 106測強曲線 7混凝土強度的推定 附錄A回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑側(cè)面） 附錄B回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑底面） 18附錄C回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑表面） 23附錄D超聲回彈綜合法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑側(cè)面） 28附錄E超聲回彈綜合法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑底面） 34附錄F超聲回彈綜合法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑表面） 40本規(guī)程用詞說明 47引用標(biāo)準名錄 48附：條文說明 494Contents1GeneralProvisions 12TermsandSymbol 22.1Terms 22.2Symbol 23ReboundHammerandUltrasonicDetector 43.1TechnicalRequirementsofReboundHammer 43.2TechnicalRequirementsofUltrasonicDetector 54TestingTechnology 74.1GeneralRequirements 74.2ReboundValueMeasurement 84.3CarbonationDepthMeasurement 94.4UltrasonicPulseWaveMeasurement 95CalculationofReboundValueandUltrasonicPulseWaveVelocity 106TestingStrengthCurve 7CalculationofCompressiveStrengthforConcrete AppendixAConversionTableofCompressiveStrengthofPumpedConcreteforTestAreabyReboundMethod(SideSurfaceofCastConcrete) 14AppendixBConversionTableofCompressiveStrengthofPumpedConcreteforTestAreabyReboundMethod(LowerSurfaceofCastConcrete) 18AppendixCConversionTableofCompressiveStrengthofPumpedConcreteforTestAreabyReboundMethod(UpperSurfaceofCastConcrete) 23AppendixDConversionTableofCompressiveStrengthofPumpedConcreteforTestAreabyUltrasonic-ReboundCombinedMethod(SideSurfaceofCastConcrete) 28AppendixEConversionTableofCompressiveStrengthofPumpedConcreteforTestAreabyUltrasonic-ReboundCombinedMethod(LowerSurfaceofCastConcrete) 34AppendixFConversionTableofCompressiveStrengthofPumpedConcreteforTestAreabyUltrasonic-ReboundCombinedMethod(UpperSurfaceofCastConcrete) 40ExplanationofWordinginThisSpecification 47ListofQuotedStandards 48Addition:ExplanationofProvisions 4911.0.1為提高回彈法、超聲回彈綜合法在北京地區(qū)檢測泵送混凝土抗壓強度（以下簡稱混凝土強度）的精度，保障檢測工作質(zhì)量，制定本規(guī)程。1.0.2本規(guī)程適用于北京地區(qū)建設(shè)工程泵送普通混凝土強度的檢測。本規(guī)程不適用于內(nèi)部存在缺陷和輕骨料混凝土。1.0.3回彈法、超聲回彈綜合法檢測泵送混凝土強度除應(yīng)遵守本規(guī)程外，尚應(yīng)符合國家現(xiàn)行有關(guān)標(biāo)準22.1術(shù)語2.1.1構(gòu)件member按照檢測要求確定的各層軸線與軸線間的梁、板、柱、墻等混凝土結(jié)構(gòu)單元。2.1.2測區(qū)testarea檢測構(gòu)件混凝土強度時的一個檢測區(qū)域。2.1.3測點testpoint測區(qū)內(nèi)的一個回彈檢測點。2.1.4回彈法reboundmethod回彈法是用彈簧驅(qū)動的重錘，通過彈擊桿(傳力桿)，彈擊混凝土表面，并測出重錘被反彈回來的距離，依據(jù)測量得到的回彈值(反彈距離與彈簧初始長度之比)作為與強度相關(guān)的指標(biāo)，來推定混凝土強度的方法。2.1.5超聲回彈綜合法ultrasonic-reboundcombinedmethod依據(jù)測量得到的混凝土超聲波聲速值和回彈值作為與強度相關(guān)的指標(biāo)，來推定混凝土強度的方法。2.1.6超聲速度ultrasonicpulsewavevelocity超聲脈沖波在混凝土中單位時間內(nèi)傳播的距離。2.1.7測區(qū)混凝土強度換算值conversionvalueofconcretecompressivestrengthoftestarea由測區(qū)的平均回彈值和碳化深度值或聲速值通過測強曲線或測區(qū)強度換算表換算得到的測區(qū)現(xiàn)齡期混凝土強度值。2.1.8混凝土強度推定值estimationvalueofstrengthforconcrete相應(yīng)于強度換算值總體分布中保證率不低于95%的構(gòu)件現(xiàn)齡期混凝土的強度值。2.2符號m——構(gòu)件測區(qū)平均碳化深度值。fci——測區(qū)混凝土強度換算值。fcor,m——芯樣試件混凝土強度平均值。fcm0——對應(yīng)芯樣部位回彈測區(qū)的混凝土強度換算值的平均值。fcor,i——第i個混凝土芯樣試件的抗壓強度。fci0——修正前第i個測區(qū)的混凝土強度換算值。3fci1——修正后第i個測區(qū)的混凝土強度換算值。fc:min——構(gòu)件中測區(qū)混凝土強度換算值的最小值。fcu,e——構(gòu)件混凝土強度推定值。mf——構(gòu)件測區(qū)混凝土強度換算值的平均值。sf——構(gòu)件測區(qū)混凝土強度換算值的標(biāo)準差。Ri——測區(qū)第i個測點的回彈值。Rm——測區(qū)的平均回彈值。li——測區(qū)第i個測點的超聲測距。ti——測區(qū)第i個測點的聲時讀數(shù)。v——測區(qū)的聲速代表值?！鱰ot——測區(qū)混凝土強度修正量。3.1回彈儀技術(shù)要求3.1.1回彈儀可為數(shù)字式，也可為指針直讀式。3.1.2回彈儀除應(yīng)符合《回彈儀》GB/T9138的規(guī)定外，尚應(yīng)符合下列規(guī)定：1水平彈擊時，彈擊錘脫鉤的瞬間，回彈儀的標(biāo)稱能量應(yīng)為2.207J；2在彈擊錘與彈擊桿碰撞的瞬間，彈擊拉簧應(yīng)處于自由狀態(tài)，且彈擊錘起跳點應(yīng)位于指針指示刻度尺上“0”處；3在洛氏硬度HRC為60±2的鋼砧上的率定值應(yīng)為80±2；4數(shù)字式回彈儀應(yīng)帶有指針直讀示值系統(tǒng)；數(shù)字顯示的回彈值與指針直讀示值相差不應(yīng)超過1。3.1.3回彈儀使用的環(huán)境溫度應(yīng)為（-4～40）℃。3.1.4回彈儀檢定（校準）周期為半年。當(dāng)回彈儀具有下列情況之一時，應(yīng)進行檢定（校準1新回彈儀啟用前；2超過檢定（校準）有效期限；3數(shù)字式回彈儀數(shù)字顯示的回彈值與指針直讀示值相差大于1；4經(jīng)保養(yǎng)后，在鋼砧上的率定值不合格；5遭受嚴重撞擊或其他損害。3.1.5回彈儀率定試驗應(yīng)符合下列規(guī)定：1回彈儀率定試驗所用鋼砧應(yīng)每2年進行檢定（校準）；2率定試驗應(yīng)在室溫為（5～35）℃的條件下進行；3率定試驗應(yīng)在洛氏硬度HRC為60±2的鋼砧上進行，鋼砧表面應(yīng)干燥、清潔，并應(yīng)穩(wěn)固地平放在剛度大的物體上；4回彈值應(yīng)取連續(xù)向下彈擊三次的穩(wěn)定回彈結(jié)果的平均值；5率定試驗應(yīng)分四個方向進行，且每個方向彈擊前，彈擊桿應(yīng)旋轉(zhuǎn)90度，每個方向的回彈平均值應(yīng)為80±2。3.1.6回彈儀具有下列情況之一時，應(yīng)進行保養(yǎng)：2在鋼砧上的率定值不合格；3對檢測值有懷疑。3.1.7回彈儀的保養(yǎng)應(yīng)符合下列規(guī)定：1先將彈擊錘脫鉤，取出機芯，然后卸下彈擊桿，取出里面的緩沖壓簧，并取出彈擊錘、彈擊拉簧和拉簧座；52清潔機芯各零部件，并應(yīng)重點清理中心導(dǎo)桿、彈擊錘和彈擊桿的內(nèi)孔及沖擊面。清理后，應(yīng)在中心導(dǎo)桿上薄薄涂抹鐘表油，其他零部件不得抹油；3清理機殼內(nèi)壁，卸下刻度尺，檢查指針，其摩擦力應(yīng)為（0.5～0.8）N；4對于數(shù)字式回彈儀，還應(yīng)按產(chǎn)品要求的維護程序進行維護；5保養(yǎng)時，不得旋轉(zhuǎn)尾蓋上已定位緊固的調(diào)零螺絲，不得自制或更換零部件；6保養(yǎng)后按本規(guī)程第3.1.5條的規(guī)定進行率定試驗。3.1.8回彈儀使用完畢，應(yīng)使彈擊桿伸出機殼，并應(yīng)清除彈擊桿、桿前端球面以及刻度尺表面和外殼上的污垢、塵土?；貜梼x不用時，應(yīng)將彈擊桿壓入機殼內(nèi)，經(jīng)彈擊后應(yīng)按下按鈕，鎖住機芯，然后裝入儀器箱。儀器箱應(yīng)平放在干燥陰涼處。當(dāng)數(shù)字式回彈儀長期不用時，還應(yīng)取出電池。3.2超聲波檢測儀技術(shù)要求3.2.1超聲波檢測儀可為模擬式，也可為數(shù)字式。1模擬式：接收信號為連續(xù)模擬量，可由時域波形信號測讀聲學(xué)參數(shù)。2數(shù)字式：接收的信號轉(zhuǎn)化為離散數(shù)字量，具有采集、儲存數(shù)字信號、測讀聲學(xué)參數(shù)和對數(shù)字信號處理的智能化功能。3.2.2超聲波檢測儀除應(yīng)符合《混凝土超聲波檢測儀》JG/T5004的規(guī)定外，尚應(yīng)符合下列規(guī)定：1具有波形清晰、顯示穩(wěn)定的示波裝置；2聲時最小分度為0.1μs；3具有最小分度為1dB的衰減系統(tǒng)；4接收放大器頻響范圍10kHz～500kHz，總增益不小于80dB，接收靈敏度（在信噪比為3:1時）3.2.3模擬式超聲波檢測儀還應(yīng)滿足下列要求：1具有手動游標(biāo)和自動整形兩種聲時測讀功能；2數(shù)字顯示穩(wěn)定。聲時調(diào)節(jié)在20μs～30μs范圍，連續(xù)1h數(shù)字變化不大于±0.2μs。3.2.4數(shù)字式超聲波檢測儀還應(yīng)滿足下列要求：1具有采集、儲存數(shù)字信號并進行數(shù)據(jù)處理的功能；2具有手動游標(biāo)測讀和自動測讀的方式。當(dāng)自動測讀時，在同一測試條件下，1h內(nèi)每5min測讀一次聲時值的差異應(yīng)不大于±0.2μs；3自動測讀方式下，在顯示器的接收波形上應(yīng)有光標(biāo)指示聲時的測讀位置。3.2.5換能器的頻率宜在50kHz～100kHz以內(nèi)，實測主頻與標(biāo)稱頻率相差應(yīng)不大于±10%。3.2.6超聲波檢測儀的使用環(huán)境溫度應(yīng)為(0～40)℃。63.2.7超聲波檢測儀檢定（校準）周期為1年。3.2.8超聲波檢測儀保養(yǎng)應(yīng)符合下列規(guī)定：1應(yīng)存放在陰涼、干燥的環(huán)境中；2較長時間不用時，應(yīng)定期通電排除潮氣；3工作時應(yīng)采取防塵、防震措施。74.1一般規(guī)定4.1.1回彈儀和超聲波檢測儀應(yīng)在檢定（校準）有效期內(nèi)使用?；貜梼x在檢測前后，均應(yīng)在鋼砧上進行率定試驗，并應(yīng)符合本規(guī)程第3.1.2條的規(guī)定。4.1.2混凝土強度檢測前，委托單位宜提供下列技術(shù)資料：1構(gòu)件名稱、外形尺寸、數(shù)量及混凝土類型和強度等級；2水泥安定性、粗骨料最大粒徑、外加劑、摻合料品種、混凝土配合比、泵送混凝土生產(chǎn)單位等；3施工模板，混凝土澆筑、養(yǎng)護情況及澆筑日期等；4必要的設(shè)計圖紙和施工記錄；5檢測原因。4.1.3混凝土強度檢測可按單個構(gòu)件或按批量進行檢測，并應(yīng)符合下列規(guī)定：1單個構(gòu)件檢測應(yīng)符合本規(guī)程第4.1.4條和第4.1.5條的規(guī)定。2批量檢測適用于在相同的生產(chǎn)工藝條件下，混凝土強度等級相同，原材料、配合比、成型工藝、養(yǎng)護條件基本一致且齡期相近的一批同類構(gòu)件的檢測。按批量檢測時，應(yīng)隨機抽取構(gòu)件并使所抽構(gòu)件具有代表性，抽檢數(shù)量不宜少于同批構(gòu)件總數(shù)的30%且不宜少于10件。當(dāng)檢驗批構(gòu)件數(shù)量大于30個時，抽檢的構(gòu)件數(shù)量可按《建筑結(jié)構(gòu)檢測技術(shù)標(biāo)準》GB/T50344和《混凝土現(xiàn)場檢測技術(shù)標(biāo)準》GB/T50784的規(guī)定執(zhí)行。4.1.4單個構(gòu)件的檢測，其測區(qū)數(shù)不宜少于10個。當(dāng)出現(xiàn)下列情況之一時，每個構(gòu)件的測區(qū)數(shù)可適當(dāng)減少，但不應(yīng)少于5個：1受檢構(gòu)件數(shù)量大于30個且不需要提供單個構(gòu)件推定強度。2受檢構(gòu)件某一方向尺寸不大于4.5m且另一方向尺寸不大于0.3m。4.1.5構(gòu)件的測區(qū)布置應(yīng)符合下列規(guī)定：1測區(qū)應(yīng)優(yōu)先選在能使回彈儀處于水平方向的混凝土澆筑側(cè)面。當(dāng)不具備條件時，應(yīng)優(yōu)先選在能使回彈儀處于垂直向上方向的混凝土澆筑底面。當(dāng)澆筑側(cè)面和澆筑底面均不具備條件時，可選在能使回彈儀處于垂直向下方向的混凝土澆筑表面。2測區(qū)宜布置在構(gòu)件的兩個對稱的可測面上，當(dāng)不能布置在對稱的可測面上時，可布置在同一可測面上，且應(yīng)均勻分布。宜在構(gòu)件的重要部位及薄弱部位布置測區(qū)，并應(yīng)避開預(yù)埋件。3相鄰兩測區(qū)的間距不應(yīng)大于2m，測區(qū)離構(gòu)件端部或施工縫邊緣的距離不宜大于0.5m，且不宜小于0.2m。4每個測區(qū)的面積宜為0.04m2。85測區(qū)表面應(yīng)清潔、平整、干燥，不應(yīng)有疏松層、浮漿、油垢、涂層以及蜂窩、麻面。6測區(qū)應(yīng)標(biāo)有清晰的編號，宜在原始記錄上繪制測區(qū)布置示意圖并描述外觀質(zhì)量情況。4.1.6當(dāng)檢測條件與本規(guī)程測強曲線的適用條件有較大差異時，可采用在構(gòu)件上鉆取的混凝土芯樣對測區(qū)混凝土強度換算值進行修正。對同一強度等級混凝土修正時，宜使用直徑為100mm的芯樣，數(shù)量不應(yīng)少于6個；也可采用小直徑芯樣，其直徑不應(yīng)小于70mm，數(shù)量不應(yīng)少于9個。芯樣應(yīng)在回彈或超聲回彈檢測的測區(qū)內(nèi)鉆取，并應(yīng)符合《鉆芯法檢測混凝土強度技術(shù)規(guī)程》JGJ/T384的規(guī)定。計算時，測區(qū)混凝土強度修正量及測區(qū)混凝土強度換算值的修正方法應(yīng)符合下列規(guī)定：1修正量應(yīng)按下列公式計算：△tot=fcor,m－fcm0（4.1.6-1）（4.1.6-2）（4.1.6-3）式中：△tot——測區(qū)混凝土強度修正量(MPa)，精確至0.1MPa；fcor,m——芯樣試件的混凝土抗壓強度平均值(MPa)，精確至0.1MPa；fcm0——對應(yīng)芯樣部位回彈測區(qū)的混凝土強度換算值的平均值(MPa)，精確至0.1MPa；fcor,i——第i個芯樣試件的混凝土抗壓強度值(MPa)，精確至0.1MPa；fci——對應(yīng)第i個芯樣部位回彈測區(qū)的混凝土強度換算值(MPa)，精確至0.1MPa；n——芯樣數(shù)量。2測區(qū)混凝土強度換算值的修正應(yīng)按下式計算：△tot（4.1.6-4）式中：fci0——第i個測區(qū)修正前的混凝土強度換算值(MPa)，精確至0.1MPa；fci1——第i個測區(qū)修正后的混凝土強度換算值(MPa)，精確至0.1MPa。4.2回彈值測量4.2.1測量回彈值時，回彈儀的軸線應(yīng)始終垂直于混凝土檢測面，并應(yīng)緩慢施壓、準確讀數(shù)、快速復(fù)位。對彈擊時產(chǎn)生顫動的薄壁、小型構(gòu)件應(yīng)進行固定。4.2.2每一測區(qū)應(yīng)讀取16個回彈值，每一測點的回彈值讀數(shù)應(yīng)精確至1。測點宜在測區(qū)范圍內(nèi)均勻分布，相鄰兩測點的凈距離不宜小于20mm；測點距外露鋼筋、預(yù)埋件的距離不宜小于30mm；測點不應(yīng)9在氣孔或外露石子上，同一測點應(yīng)只彈擊一次。4.3碳化深度值測量4.3.1回彈值測量完畢后，應(yīng)在有代表性的測區(qū)上測量碳化深度值，測點數(shù)不應(yīng)少于構(gòu)件測區(qū)數(shù)的30%，應(yīng)取其平均值為該構(gòu)件每個測區(qū)的碳化深度值，并應(yīng)精確至0.5mm。當(dāng)碳化深度值極差大于2.0mm時，應(yīng)在每一測區(qū)分別測量碳化深度值。4.3.2測區(qū)碳化深度值測量應(yīng)符合下列規(guī)定：1在測區(qū)表面形成直徑約15mm的孔洞，其深度應(yīng)大于混凝土的碳化深度；2清除孔洞中的粉末和碎屑，且不得用水擦洗；3采用濃度為1%～2%的酚酞酒精溶液滴在孔洞內(nèi)壁的邊緣處，當(dāng)已碳化與未碳化界線清晰時，立即采用碳化深度測量儀測量已碳化與未碳化混凝土交界面到混凝土表面的垂直距離，并測量3次，且測點應(yīng)均勻分布，每次讀數(shù)應(yīng)精確至0.25mm；4應(yīng)取3次測量值的平均值作為測區(qū)檢測結(jié)果，并應(yīng)精確至0.5mm。4.4超聲測量4.4.1超聲測試宜采用對測。超聲測點應(yīng)布置在回彈測試的同一測區(qū)內(nèi)，每一測區(qū)應(yīng)布置3個測點。4.4.2超聲測量應(yīng)符合下列規(guī)定：1檢測時，先在超聲波檢測儀上配置合適的換能器和高頻電纜，并對聲時值進行置零；2超聲測試時，換能器輻射面應(yīng)通過耦合劑與混凝土測試面良好耦合；3聲時測量應(yīng)精確至0.1μs，超聲測距測量應(yīng)精確至1.0mm，且測量誤差應(yīng)不大于±1%。5.0.1計算測區(qū)平均回彈值，應(yīng)從該測區(qū)的16個回彈值中剔除3個最大值和3個最小值，余下的10個回彈值應(yīng)按下式計算：（5.0.1）式中Rm——測區(qū)平均回彈值，精確至0.1；Ri——第i個測點的回彈值。5.0.2測區(qū)的聲速代表值應(yīng)按下式計算：（5.0.2）式中v——測區(qū)的聲速代表值（km/s精確至0.01km/s；li——第i個測點的超聲測距（mm精確至1.0mm；ti——第i個測點的聲時讀數(shù)(μs精確至0.1μs。6.0.1本規(guī)程建立了結(jié)構(gòu)構(gòu)件混凝土澆筑側(cè)面、澆筑底面、澆筑表面的回彈法測強曲線和超聲回彈綜合法測強曲線，見附錄A至附錄F。6.0.2符合下列條件的泵送混凝土，測區(qū)強度應(yīng)按本規(guī)程附錄A至附錄F進行測區(qū)混凝土強度換算：1北京地區(qū)泵送混凝土；2采用普通成型工藝；3采用符合國家有關(guān)標(biāo)準規(guī)定的模板；4自然養(yǎng)護，且混凝土表層為干燥狀態(tài)；5齡期為14d～365d；6抗壓強度為15MPa～60MPa。6.0.3本規(guī)程測區(qū)混凝土強度換算表附錄A至附錄F所依據(jù)的北京地區(qū)泵送混凝土測強曲線，其強度誤差符合下列規(guī)定：1平均相對誤差(δ)不應(yīng)大于±14.0%；2相對標(biāo)準差（er）不應(yīng)大于17.0%。6.0.4當(dāng)有下列情況之一時，測區(qū)強度不得按本規(guī)程附錄A至附錄F進行測區(qū)混凝土強度換算：1檢測部位曲率半徑小于250mm；2潮濕或浸水混凝土；3特種成型工藝制作的混凝土。7.0.1采用回彈法檢測時，構(gòu)件第i個測區(qū)混凝土強度換算值（fci可由按本規(guī)程第5.0.1條規(guī)定求得的平均回彈值（Rm）和按本規(guī)程第4.3節(jié)規(guī)定求得的平均碳化深度值（dm）查表或計算得出，并應(yīng)符合下列規(guī)定：1檢測面為澆筑側(cè)面時，構(gòu)件第i個測區(qū)混凝土強度換算值（fci）可由本規(guī)程附錄A查表得出或按下式計算得出：fci=0.210595R.486310-0.0062d（7.0.1-1）2檢測面為澆筑底面時，構(gòu)件第i個測區(qū)混凝土強度換算值（fci）可由本規(guī)程附錄B查表得出或按下式計算得出：fci=0.030685R.903010-0.0097d（7.0.1-2）3檢測面為澆筑表面時，構(gòu)件第i個測區(qū)混凝土強度換算值（fci）可由本規(guī)程附錄C查表得出或按下式計算得出：fci=0.462321R.282410-0.0092d（7.0.1-3）7.0.2采用超聲回彈綜合法檢測時，構(gòu)件第i個測區(qū)混凝土強度換算值（fci可由按本規(guī)程第5.0.2條規(guī)定求得的聲速代表值（v）和按本規(guī)程第5.0.1條規(guī)定求得的平均回彈值（Rm）查表或計算得出，并應(yīng)符合下列規(guī)定：1檢測面為澆筑側(cè)面時，構(gòu)件第i個測區(qū)混凝土強度換算值（fci）可由本規(guī)程附錄D查表得出或按下式計算得出：fci=0.059227v1.4968Rm1.1984（7.0.2-1）2檢測面為澆筑底面時，構(gòu)件第i個測區(qū)混凝土強度換算值（fci）可由本規(guī)程附錄E查表得出或按下式計算得出：?,=0.015965v2""R。1"（7.0.2-2）3檢測面為澆筑表面時，構(gòu)件第i個測區(qū)混凝土強度換算值（fci）可由本規(guī)程附錄F查表得出或按下式計算得出：?,=0.116802vl"Rn"""（7.0.2-3）7.0.3構(gòu)件的測區(qū)混凝土換算強度平均值可根據(jù)各測區(qū)的混凝土強度換算值計算。當(dāng)測區(qū)數(shù)為10個及以上時，應(yīng)計算強度標(biāo)準差。平均值及標(biāo)準差應(yīng)按下列公式計算：（7.0.3-1）（7.0.3-2）式中mc——構(gòu)件測區(qū)混凝土強度換算值的平均值（MPa精確至0.1MPa；fcusc——構(gòu)件測區(qū)混凝土強度換算值的標(biāo)準差（MPa精確至0.01MPa；fcun——對于單個檢測的構(gòu)件，取該構(gòu)件的測區(qū)數(shù)；對批量檢測的構(gòu)件，取所有被抽檢構(gòu)件測區(qū)數(shù)之和。7.0.4構(gòu)件的現(xiàn)齡期混凝土強度推定值（fcu,e）應(yīng)符合下列規(guī)定：fcu,e=fcmin（7.0.4-1）式中fc:min——構(gòu)件中最小的測區(qū)混凝土強度換算值。2當(dāng)構(gòu)件的測區(qū)強度值中出現(xiàn)小于15.0MPa時：fcu,e<15.0MPa（7.0.4-2）3當(dāng)構(gòu)件測區(qū)數(shù)不少于10個，應(yīng)按下列公式計算：fcu,e=mf-1.645sf（7.0.4-3）4當(dāng)按批量檢測時，應(yīng)按下列公式計算：（7.0.4-4）式中，k——推定系數(shù)，宜取1.645。當(dāng)需要進行推定強度區(qū)間時，可按《建筑結(jié)構(gòu)檢測技術(shù)標(biāo)準》GB/T50344和《混凝土現(xiàn)場檢測技術(shù)標(biāo)準》GB/T50784的規(guī)定取值。7.0.5對按批量檢測的構(gòu)件，當(dāng)該批構(gòu)件混凝土強度標(biāo)準差出現(xiàn)下列情況之一時，則該批構(gòu)件應(yīng)全部按單個構(gòu)件檢測：1當(dāng)該批構(gòu)件混凝土強度平均值小于25MPa、sf大于4.50MPa時；2當(dāng)該批構(gòu)件混凝土強度平均值不小于25MPa且不大于60MPa、sf大于5.50MPa時。表A回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑側(cè)面）平均值測區(qū)混凝土強度換算值（MPa）平均碳化深度值（mm）0.00.52.02.53.03.54.04.55.05.56.06.57.07.5------------------------------------------------------20.020.220.420.620.821.021.221.420.021.620.320.120.021.820.520.420.320.120.022.020.820.720.520.420.220.120.022.221.121.020.820.720.520.420.220.122.421.421.221.120.920.820.620.520.420.220.122.621.721.521.421.221.120.920.820.620.520.320.220.022.822.021.821.721.521.321.221.020.920.720.620.520.320.220.023.022.322.121.921.821.621.521.321.221.020.920.720.620.420.320.120.023.222.522.422.222.121.921.821.621.421.321.121.020.820.720.520.420.320.123.422.822.722.522.322.222.021.921.721.621.421.321.121.020.820.720.520.423.623.123.022.822.622.522.322.222.021.821.721.521.421.221.120.920.820.623.823.423.223.122.922.822.622.422.322.122.021.821.621.521.321.221.020.924.023.723.523.423.223.022.922.722.622.422.222.121.921.821.621.521.321.124.224.023.823.723.523.323.223.022.822.722.522.322.222.021.921.721.621.424.424.324.124.023.823.623.423.323.122.922.822.622.522.322.122.021.821.724.624.624.424.224.123.923.723.623.423.223.122.922.722.622.422.322.121.924.824.924.724.524.424.224.023.823.723.523.323.223.022.822.722.522.422.225.025.225.024.824.724.524.324.124.023.823.623.523.323.123.022.822.622.5表A回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑側(cè)面）平均值測區(qū)混凝土強度換算值（MPa）平均碳化深度值（mm）0.00.52.02.53.03.54.04.55.05.56.06.57.07.525.225.525.325.124.924.824.624.424.224.123.923.723.623.423.223.122.922.725.425.825.625.425.225.124.924.724.524.424.224.023.823.723.523.323.223.025.626.125.925.725.525.425.225.024.824.624.524.324.124.023.823.623.423.325.826.426.226.025.825.725.525.325.124.924.824.624.424.224.123.923.723.526.026.726.526.326.125.925.825.625.425.225.024.924.724.524.324.224.023.826.227.026.826.626.426.226.125.925.725.525.325.125.024.824.624.424.324.126.427.327.126.926.726.526.426.226.025.825.625.425.325.124.924.724.524.426.627.627.427.227.026.826.726.526.326.125.925.725.525.425.225.024.824.626.827.927.727.527.327.127.026.826.626.426.226.025.825.625.525.325.124.927.028.228.027.827.627.427.327.126.926.726.526.326.125.925.725.625.425.227.228.628.328.127.927.727.627.427.227.026.826.626.426.226.025.825.725.527.428.928.728.528.328.127.927.727.527.327.126.926.726.526.326.125.925.727.629.229.028.828.628.428.228.027.827.627.427.227.026.826.626.426.226.027.829.529.329.128.928.728.528.328.127.927.727.527.327.126.926.726.526.328.029.829.629.429.229.028.828.628.428.228.027.827.627.427.227.026.826.628.230.129.929.729.529.329.128.928.728.528.328.127.927.727.527.327.126.928.430.430.230.029.829.629.429.229.028.828.628.328.127.927.727.527.427.228.630.830.530.330.129.929.729.529.329.128.828.628.428.228.027.827.627.428.831.130.930.630.430.230.029.829.629.429.228.928.728.528.328.127.927.729.031.431.231.030.730.530.330.129.929.729.529.229.028.828.628.428.228.029.231.731.531.331.130.830.630.430.230.029.829.529.329.128.928.728.528.329.432.131.831.631.431.130.930.730.530.330.129.829.629.429.229.028.828.629.632.432.131.931.731.531.231.030.830.630.430.129.929.729.529.329.128.929.832.732.532.232.031.831.631.331.130.930.730.430.230.029.829.629.429.230.033.032.832.632.332.131.931.631.431.231.030.830.530.330.129.929.729.530.233.433.132.932.632.432.232.031.731.531.331.130.830.630.430.230.029.830.433.733.433.233.032.732.532.332.031.831.631.431.130.930.730.530.330.030.634.033.833.533.333.132.832.632.432.131.931.731.431.231.030.830.630.330.834.334.133.933.633.433.132.932.732.432.232.031.831.531.331.130.930.631.034.734.434.233.933.733.533.233.032.832.532.332.131.831.631.431.230.931.235.034.834.534.334.033.833.533.333.132.832.632.432.131.931.731.531.231.435.335.134.834.634.434.133.933.633.433.132.932.732.432.232.031.831.531.635.735.435.234.934.734.434.233.933.733.533.233.032.832.532.332.131.831.836.035.835.535.335.034.834.534.334.033.833.533.333.132.832.632.432.132.036.436.135.835.635.335.134.834.634.334.133.833.633.433.132.932.732.432.236.736.436.235.935.735.435.234.934.734.434.233.933.733.433.233.032.732.437.036.836.536.236.035.735.535.235.034.734.534.234.033.733.533.333.032.637.437.136.836.636.336.135.835.635.335.034.834.534.334.133.833.633.332.837.737.437.236.936.736.436.135.935.635.435.134.934.634.434.133.933.6表A回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑側(cè)面）平均值測區(qū)混凝土強度換算值（MPa）平均碳化深度值（mm）0.00.52.02.53.03.54.04.55.05.56.06.57.07.533.038.137.837.537.237.036.736.536.235.935.735.435.234.934.734.434.233.933.238.438.137.937.637.337.136.836.536.336.035.835.535.235.034.734.534.333.438.738.538.237.937.737.437.136.936.636.336.135.835.635.335.134.834.633.639.138.838.538.338.037.737.437.236.936.736.436.135.935.635.435.134.933.839.439.238.938.638.338.137.837.537.237.036.736.536.235.935.735.435.234.039.839.539.238.938.738.438.137.837.637.337.036.836.536.336.035.735.534.240.139.839.639.339.038.738.438.237.937.637.437.136.836.636.336.135.834.440.540.239.939.639.339.138.838.538.238.037.737.437.236.936.636.436.134.640.840.540.340.039.739.439.138.838.638.338.037.737.537.236.936.736.434.841.240.940.640.340.039.739.539.238.938.638.338.137.837.537.337.036.735.041.541.240.940.740.440.139.839.539.238.938.738.438.137.937.637.337.135.241.941.641.341.040.740.440.139.839.639.339.038.738.438.237.937.637.435.442.241.941.641.341.140.840.540.239.939.639.339.138.838.538.238.037.735.642.642.342.041.741.441.140.840.540.239.939.739.439.138.838.538.338.035.843.042.642.342.041.741.441.240.940.640.340.039.739.439.138.938.638.336.043.343.042.742.442.141.841.541.240.940.640.340.039.839.539.238.938.636.243.743.443.042.742.442.141.841.541.241.040.740.440.139.839.539.239.036.444.043.743.443.142.842.542.241.941.641.341.040.740.440.139.839.639.336.644.444.143.843.443.142.842.542.241.941.641.341.040.740.540.239.939.636.844.744.444.143.843.543.242.942.642.342.041.741.441.140.840.540.239.937.045.144.844.544.243.843.543.242.942.642.342.041.741.441.140.840.540.237.245.545.144.844.544.243.943.643.342.942.642.342.041.741.441.140.940.637.445.845.545.244.944.544.243.943.643.343.042.742.442.141.841.541.240.937.646.245.945.545.244.944.644.343.943.643.343.042.742.442.141.841.541.237.846.646.245.945.645.344.944.644.344.043.743.443.142.742.442.141.841.538.046.946.646.345.945.645.345.044.644.344.043.743.443.142.842.542.241.938.247.347.046.646.346.045.645.345.044.744.444.043.743.443.142.842.542.238.447.747.347.046.746.346.045.745.345.044.744.444.143.843.443.142.842.538.648.047.747.447.046.746.446.045.745.445.044.744.444.143.843.543.242.938.848.448.147.747.447.046.746.446.045.745.445.144.844.444.143.843.543.239.048.848.448.147.747.447.146.746.446.145.745.445.144.844.544.143.843.539.249.248.848.548.147.847.447.146.846.446.145.845.445.144.844.544.243.839.449.549.248.848.548.147.847.447.146.846.446.145.845.545.144.844.544.239.649.949.549.248.848.548.247.847.547.146.846.546.145.845.545.244.844.539.850.349.949.649.248.948.548.247.847.547.146.846.546.145.845.545.244.840.050.750.349.949.649.248.948.548.247.847.547.246.846.546.245.845.545.240.251.050.750.349.949.649.248.948.548.247.947.547.246.846.546.245.845.540.451.451.050.750.350.049.649.348.948.648.247.947.547.246.946.546.245.940.651.851.451.150.750.350.049.649.348.948.648.247.947.547.246.946.546.240.852.251.851.451.150.750.350.049.649.348.948.648.247.947.547.246.946.5表A回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑側(cè)面）平均值測區(qū)混凝土強度換算值（MPa）平均碳化深度值（mm）0.00.52.02.53.03.54.04.55.05.56.06.57.07.541.052.552.251.851.451.150.750.350.049.649.348.948.648.247.947.547.246.941.252.952.552.251.851.451.150.750.350.049.649.348.948.648.247.947.647.241.453.352.952.652.251.851.451.150.750.350.049.649.348.948.648.247.947.641.653.753.352.952.652.251.851.451.150.750.450.049.649.348.948.648.247.941.854.153.753.352.952.652.251.851.451.150.750.450.049.649.348.948.648.242.054.554.153.753.352.952.652.251.851.451.150.750.350.049.649.348.948.642.254.854.554.153.753.352.952.552.251.851.451.150.750.350.049.649.348.942.455.254.854.554.153.753.352.952.552.251.851.451.150.750.350.049.649.342.655.655.254.854.454.153.753.352.952.552.251.851.451.150.750.350.049.642.856.055.655.254.854.454.053.753.352.952.552.251.851.451.050.750.350.043.056.456.055.655.254.854.454.053.753.352.952.552.151.851.451.050.750.343.256.856.456.055.655.254.854.454.053.653.352.952.552.151.851.451.050.743.457.256.856.456.055.655.254.854.454.053.653.252.952.552.151.751.451.043.657.657.256.856.456.055.655.254.854.454.053.653.252.852.552.151.751.443.858.057.657.156.756.355.955.555.154.754.454.053.653.252.852.552.151.744.058.457.957.557.156.756.355.955.555.154.754.354.053.653.252.852.452.144.258.858.357.957.557.156.756.355.955.555.154.754.353.953.553.252.852.444.459.158.758.357.957.557.156.756.355.955.555.154.754.353.953.553.152.844.659.559.158.758.357.957.557.056.656.255.855.455.054.754.353.953.553.144.859.959.559.158.758.357.857.457.056.656.255.855.455.054.654.253.953.545.0-59.959.559.158.658.257.857.457.056.656.255.855.455.054.654.253.845.2--59.959.559.058.658.257.857.457.056.656.255.855.455.054.654.245.4---59.859.459.058.658.257.757.356.956.556.155.755.354.954.545.6----59.859.459.058.558.157.757.356.956.556.155.755.354.945.8-----59.859.358.958.558.157.757.356.956.556.155.755.346.0------59.759.358.958.558.157.657.256.856.456.055.646.2-------59.759.358.858.458.057.657.256.856.456.046.4--------59.659.258.858.458.057.657.156.756.346.6---------59.659.258.858.357.957.557.156.746.8---------60.059.659.158.758.357.957.557.147.0----------59.959.559.158.758.257.857.447.2-----------59.959.559.058.658.257.847.4------------59.859.459.058.658.247.6-------------59.859.458.958.547.8--------------59.759.358.948.0---------------59.759.248.2----------------59.648.4----------------60.0注：表中未注明的測區(qū)混凝土強度換算值為小于15MPa或大于60MPa。表B回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑底面）平均值測區(qū)混凝土強度換算值（MPa）平均碳化深度值（mm）0.00.52.02.53.03.54.04.55.05.56.06.57.07.526.0----------------26.2--------------26.4-------------26.6------------26.8-----------27.0---------27.2--------27.4-------27.6------27.8----28.0---28.2--28.4-28.628.829.029.229.429.629.830.030.220.130.420.420.130.620.620.420.230.820.920.620.420.220.031.021.120.920.720.420.220.031.221.421.220.920.720.520.220.031.421.721.421.220.920.720.520.320.031.621.921.721.421.221.020.720.520.320.031.822.221.921.721.521.221.020.720.520.320.132.022.522.222.021.721.521.221.020.820.520.320.132.222.722.522.222.021.721.521.221.020.820.520.320.132.423.022.722.522.222.021.721.521.321.020.820.620.320.132.623.323.022.722.522.222.021.821.521.321.020.820.620.320.132.823.523.323.022.822.522.322.021.821.521.321.020.820.620.420.133.023.823.523.323.022.822.522.322.021.821.521.321.120.820.620.420.133.224.123.823.523.323.022.822.522.322.021.821.521.321.120.820.620.420.133.424.424.123.823.623.323.022.822.522.322.021.821.521.321.120.820.620.433.624.624.424.123.823.623.323.022.822.522.322.021.821.521.321.120.820.6表B回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑底面）平均值測區(qū)混凝土強度換算值（MPa）平均碳化深度值（mm）0.00.52.02.53.03.54.04.55.05.56.06.57.07.533.824.924.624.424.123.823.623.323.022.822.522.322.021.821.521.321.120.834.025.224.924.624.424.123.823.623.323.022.822.522.322.021.821.521.321.134.225.525.224.924.624.424.123.823.623.323.022.822.522.322.021.821.521.334.425.825.525.224.924.624.424.123.823.623.323.022.822.522.322.021.821.534.626.025.825.525.224.924.624.424.123.823.623.323.022.822.522.322.021.834.826.326.025.825.525.224.924.624.424.123.823.623.323.022.822.522.322.035.026.626.326.025.725.525.224.924.624.324.123.823.523.323.022.822.522.335.226.926.626.326.025.725.525.224.924.624.324.123.823.523.323.022.822.535.427.226.926.626.326.025.725.425.224.924.624.324.123.823.523.323.022.835.627.527.226.926.626.326.025.725.425.124.924.624.324.123.823.523.323.035.827.827.527.226.926.626.326.025.725.425.124.924.624.324.023.823.523.236.028.127.827.527.226.926.626.326.025.725.425.124.824.624.324.023.823.536.228.428.127.827.527.126.826.526.326.025.725.425.124.824.624.324.023.736.428.728.428.127.727.427.126.826.526.225.925.725.425.124.824.524.324.036.629.028.728.328.027.727.427.126.826.526.225.925.625.425.124.824.524.236.829.329.028.628.328.027.727.427.126.826.526.225.925.625.325.124.824.537.029.629.328.928.628.328.027.727.427.126.826.526.225.925.625.325.024.837.229.929.629.228.928.628.328.027.727.327.026.726.426.125.925.625.325.037.430.229.929.529.228.928.628.227.927.627.327.026.726.426.125.825.525.337.630.530.229.829.529.228.928.528.227.927.627.327.026.726.426.125.825.537.830.830.530.129.829.529.228.828.528.227.927.627.327.026.726.426.125.838.031.130.830.430.129.829.429.128.828.528.227.827.527.226.926.626.326.038.231.431.130.830.430.129.729.429.128.828.428.127.827.527.226.926.626.338.431.831.431.130.730.430.029.729.429.028.728.428.127.827.527.226.926.638.632.131.731.431.030.730.330.029.729.329.028.728.428.127.727.427.126.838.832.432.031.731.331.030.630.330.029.629.329.028.628.328.027.727.427.139.032.732.332.031.631.330.930.630.329.929.629.328.928.628.328.027.727.439.233.032.732.331.931.631.230.930.530.229.929.529.228.928.628.327.927.639.433.433.032.632.331.931.531.230.830.530.229.829.529.228.828.528.227.939.633.733.332.932.632.231.831.531.130.830.530.129.829.529.128.828.528.239.834.033.633.332.932.532.231.831.431.130.830.430.129.729.429.128.828.440.034.333.933.633.232.832.532.131.731.431.030.730.430.029.729.429.028.740.234.734.333.933.533.132.832.432.031.731.331.030.630.330.029.629.329.040.435.034.634.233.833.533.132.732.432.031.631.330.930.630.329.929.629.340.635.334.934.534.233.833.433.032.732.331.931.631.230.930.530.229.929.540.835.635.334.934.534.133.733.333.032.632.231.931.531.230.830.530.129.841.036.035.635.234.834.434.033.633.332.932.532.231.831.531.130.830.430.141.236.335.935.535.134.734.334.033.633.232.832.532.131.831.431.130.730.441.436.736.235.835.435.034.734.333.933.533.132.832.432.131.731.331.030.741.637.036.636.235.835.435.034.634.233.833.533.132.732.332.031.631.330.941.837.336.936.536.135.735.334.934.534.133.833.433.032.632.331.931.631.2表B回彈法北京地區(qū)泵送混凝土測區(qū)混凝土強度換算表（澆筑底面）平均值測區(qū)混凝土強度換算值（MPa）平均碳化深度值（mm）0.00.52.02.53.03.54.04.55.05.56.06.57.07.542.037.737.236.836.436.035.635.234.834.434.133.733.332.932.632.231.931.542.238.037.637.236.836.335.935.535.234.834.434.033.633.232.932.532.131.842.438.437.937.537.136.736.335.935.535.134.734.333.933.533.232.832.432.142.638.738.337.837.437.036.636.235.835.435.034.634.233.833.533.132.732.442.839.038.638.237.837.336.936.536.135.735.334.934.534.133.833.433.032.743.039.439.038.538.137.737.336.836.436.035.635.234.834.534.133.733.332.943.239.739.338.938.438.037.637.236.836.335.935.535.134.834.434.033.633.243.440.139.639.238.838.337.937.537.136.736.335.935.535.134.734.333.933.543.640.440.039.639.138.738.237.837.437.036.636.235.835.435.034.634.233.843.840.840.339.939.539.038.638.237.737.336.936.536.135.735.334.934.534.144.041.240.740.239.839.438.938.538.137.637.236.836.436.035.635.234.834.444.241.541.140.640.139.739.338.838.438.037.537.136.736.335.935.535.134.744.441.941.440.940.540.039.639.238.738.337.937.437.036.636.235.835.435.044.642.241.841.340.840.439.939.539.138.638.237.837.336.936.536.135.735.344.842.642.141.641.240.740.339.839.439.038.538.137.737.236.836.436.035.645.043.042.542.041.541.140.640.239.739.338.838.438.037.637.136.736.335.945.243.342.842.441.941.441.040.540.139.639.238.738.337.937.537.036.636.245.443.743.242.742.241.841.340.940.439.939.539.138.638.237.837.436.936.545.644.043.643.142.642.141.741.240.740.339.839.439.038.538.137.737.336.845.844.443.943.443.042.542.041.541.140.640.239.739.338.838.438.037.637.146.044.844.343.843.342.842.441.941.441.040.540.139.639.238.738.337.937.546.245.244.744.243.743.242.742.241.841.340.840.439.939.539.138.638.237.846.445.545.044.544.043.543.142.642.141.641.240.740.339.839.438.938.538.146.645.945.444.944.443.943.442.942.542.041.541.140.640.139.739.338.838.446.846.345.845.344.844.343.843.342.842.341.941.440.940.540.039.639.138.747.046.746.145.645.144.644.143.643.142.742.241.741.340.840.439.939.539.047.247.046.546.045.545.044.544.043.543.042.542.141.641.140.740.239.839.347.447.446.946.445.945.344.844.343.943.442.942.441.941.541.040.640.139.747.647.847.346.746.245.745.244.744.243.743.242.742.341.841.340.940.440.047.848.247.647.146.646.145.645.144.644.143.643.142.642.141.741.240.740.348.048.648.047.547.046.445.945.444.944.443.943.443.042.542.041.541.140.648.249.048.447.947.346.846.345.845.344.844.343.843.342.842.341.941.440.948.449.348.848.247.747.246.746.145.645.144.644.143.643.242.742.241.741.348.649.749.