掺MgO碾压混凝土自生体积变形试验研究

长江科学院院报 ›› 2006, Vol. 23 ›› Issue (3): 43-46.

掺MgO碾压混凝土自生体积变形试验研究

王述银, 覃理利, 邓建武

出版日期:2006-06-01 发布日期:2012-03-05

Study on Autogenous Volume Deformation of RCC Added with MgO

WANG Shu-Yin, QIN Li-Li, DENG Jian-Wu

Online:2006-06-01 Published:2012-03-05

摘要/Abstract

摘要： 为研究外掺一定量的MgO，能否使碾压混凝土产生微膨胀，并利用其膨胀来补偿碾压混凝土在温降时产生的收缩，防止或减少碾压混凝土由于温降产生的裂缝。使用一种新型MgO材料，从施工现场取样进行了碾压混凝土的全级配自生体积变形试验。试验结果证明：掺MgO的碾压混凝土在标准养护条件下365 d龄期的最大膨胀量为114×10-6，高温养护条件下365 d龄期的最大膨胀量为168×10-6；其膨胀量满足设计的要求。二级配碾压混凝土的膨胀量稍大于三级配碾压混凝土的膨胀量。

Abstract: Due to addition of a new type MgO material, RCC shows a stable expansion to compensate the shrinkage resulted from internal or external temperature gradient, thus minimizing the risk of cracking. Autogenous volume deformation of full - sized RCC is tested, the experimental results show that the maximum expansion ratio is 114×10-6 and 168×10-6 at the age of 365 days under standard temperature or high temperature curing conditions, respectively. Expansion ratio of wet - screened RCC is a little more than that of full - sized RCC.

王述银, 覃理利, 邓建武. 掺MgO碾压混凝土自生体积变形试验研究[J]. 长江科学院院报, 2006, 23(3): 43-46.

WANG Shu-Yin, QIN Li-Li, DENG Jian-Wu. Study on Autogenous Volume Deformation of RCC Added with MgO[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2006, 23(3): 43-46.