施工技术
施工技術
시공기술
CONSTRUCTION TECHNOLOGY
2015年
15期
39-43
,共5页
混凝土%超声声速%抗压强度%换能器频率%养护%强度推定
混凝土%超聲聲速%抗壓彊度%換能器頻率%養護%彊度推定
혼응토%초성성속%항압강도%환능기빈솔%양호%강도추정
concrete%ultrasonic velocity%compressive strength%transducers frequency%curing%strength estimation
结合长沙国际金融中心项目，使用不同频率换能器在标准龄期内和不同养护条件下进行了3种强度等级混凝土标准试件超声与抗压强度试验，分别获得了龄期为7，14，21，28d的声速与抗压强度值，较详细地分析了龄期、换能器频率和养护条件对声速与抗压强度的影响，并采用两种数学模型建立了声速与抗压强度间的相关方程与曲线。结果表明，3种强度等级混凝土声速与抗压强度间均存在相关性，参照相关方程与曲线即可利用超声波仪实现施工现场混凝土强度快速、准确推定。
結閤長沙國際金融中心項目，使用不同頻率換能器在標準齡期內和不同養護條件下進行瞭3種彊度等級混凝土標準試件超聲與抗壓彊度試驗，分彆穫得瞭齡期為7，14，21，28d的聲速與抗壓彊度值，較詳細地分析瞭齡期、換能器頻率和養護條件對聲速與抗壓彊度的影響，併採用兩種數學模型建立瞭聲速與抗壓彊度間的相關方程與麯線。結果錶明，3種彊度等級混凝土聲速與抗壓彊度間均存在相關性，參照相關方程與麯線即可利用超聲波儀實現施工現場混凝土彊度快速、準確推定。
결합장사국제금융중심항목，사용불동빈솔환능기재표준령기내화불동양호조건하진행료3충강도등급혼응토표준시건초성여항압강도시험，분별획득료령기위7，14，21，28d적성속여항압강도치，교상세지분석료령기、환능기빈솔화양호조건대성속여항압강도적영향，병채용량충수학모형건립료성속여항압강도간적상관방정여곡선。결과표명，3충강도등급혼응토성속여항압강도간균존재상관성，삼조상관방정여곡선즉가이용초성파의실현시공현장혼응토강도쾌속、준학추정。
Based on the project of Changsha International Financial Center, an experiment of ultrasonic testing and compressive strength for standard concrete samples which were made of three kinds of strength grades was carried out with different curing conditions and transducers. Finally, dates of velocity and compressive strength in 7, 14, 21 and 28 days were obtained. The impact on velocity and compressive strength caused by curing periods, transducers frequency and curing conditions was analyzed in detail, and also dependent equations between velocity and compressive strength were established by two mathematic models. The results indicate that exist correlations between concrete velocity and compressive strength. The strength of concrete can be calculated rapidly and accurately on site by applying ultrasonic detectors and referring to dependent equations and curves.
