贯入法检测传统灰浆抗压强度试验研究

Experimental study on testing compressive strength of traditional mortar by penetration resistance method

将贯入法引入文物建筑传统灰浆抗压强度检测当中,以纯白灰、多种配比白灰砂浆以及掺灰泥等传统灰浆为研究对象,研究了手工青砖砌体中传统灰浆灰缝和灰浆试块贯入深度的相关关系,得出了线性回归公式;进行了传统灰浆抗压强度随龄期增长试验,建立了各种灰浆抗压强度随龄期增长曲线,依据《贯入法检测砌筑砂浆抗压强度技术规程》(JGJ/T 136—2017)规定的测强曲线制定方法,建立了传统灰浆贯入法测强曲线。通过实际工程项目的验证,表明该曲线的精度较好,可用于文物建筑墙体砌筑所研究种类的传统灰浆的贯入法测强。

The penetration resistance method was introduced into the compressive strength testing of traditional mortar for cultural heritage building.Taking traditional mortar as the research object,such as pure lime,lime mortar with various proportions and mortar,the correlation between the traditional mortar joints and the penetration depth of mortar test blocks in manual green brick masonry was studied,and a linear regression formula was obtained.The traditional mortar compressive strength growth test with age was carried out,the curves of compressive strength growth of various mortars with age were established.According to the formulation method of testing strength curve required in Technical specification for testing compressive strength of masonry mortar by penetration resistance method(JGJ/T 136—2017),the testing strength curve of traditional mortar penetration resistance method was established.The verification of actual engineering projects shows that the accuracy of the curve is good,and it can be used to measure the strength of the traditional mortar of the type studied in the wall masonry of cultural heritage buildings.