A quantitative study on physical and chemical effects of limestone powder on properties of cement pastes
A quantitative study on physical and chemical effects of limestone powder on properties of cement pastes
复制标题
石灰石粉对水泥净浆性能物理化学影响的定量研究
DOI：
10.1016/j.conbuildmat.2019.01.154
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发表时间：
2019-04
影响因子：
7.4
通讯作者：
劳里林
中科院分区：
文献类型：
--
作者：
王德辉;史才军;Nima Farzadnia;贾煌飞;曾荣;吴有武;劳里林
The study aims to quantitatively calculate the physical and chemical effects of limestone powder (LP) with four average particle sizes and two amounts in cement pastes by using thermal gravimetric analysis (TGA), X-ray diffraction (XRD), mercury intrusion porosimetry (MIP) techniques. At 3d, as the average particle size of LP decreased from 32 to 6 μm, the consumed CaCO3content in LP increased from 0.67% to 1.71%, and the chemically reactive portion of LP increased from 1.15% to 2.95%. However, at 180d, the consumed CaCO3content and chemically reactive portion of LP was almost 2.4% and 4.2%, respectively. At 3d, as the LP content increased from 25% to 50%, the consumed CaCO3content in LP increased from 1.71% to 2.02%, and the chemically reactive portion of LP increased from 2.95% to 3.5%. However, at 180d, the differences of consumed CaCO3content and chemically reactive portion of LP between cement pastes with different LP content were limited. The physical and chemical effects of limestone powder on the compressive strength of cement pastes were calculated. At 180d, as the average particle size of LP decreased from 32 to 6 μm, the contribution of chemical effect of LP on the compressive strength of cement pastes increased from 1.01% to 1.08% while the contribution of physical effect decreased from 21.19% to 20.03%.
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