Limestone-filled pozzolanic cement
Limestone-filled pozzolanic cement
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DOI：
10.1016/s0008-8846(00)00402-6
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发表时间：
2000-11-01
影响因子：
11.4
通讯作者：
Morsy, MS
中科院分区：
文献类型：
--
作者：
Heikal, M;El-Didamony, H;Morsy, MS
填料是经过特别选择的天然或人工无机材料，可改善水泥的物理化学和机械性能，如可加工性或保水性。它们可以是惰性的，也可以具有轻微的水力、潜水或火山灰性质。除了不会以任何方式损害混凝土或砂浆的抗腐蚀性或降低钢筋的防腐性外，它们不会导致水泥用水量的显著增加。填充物通常是石灰石或任何惰性材料，如沙子。本研究的目的是研究在火山灰水泥中用石灰石代替高锰酸盐水泥的效果。通过测定结合水、游离石灰含量、体积密度、总孔隙率和抗压强度，研究了石灰石置换的效果。结果表明，随着石灰石掺量的增加，混凝土的初凝时间和终凝时间缩短，总孔隙率降低，游离石灰和结合水量增加。结果表明，石灰石填充了水泥颗粒之间的孔隙，形成了碳铝酸盐，从而加速了水泥浆体的凝结。(C)2000爱思唯尔科学有限公司。保留所有权利。
Fillers are specially selected, natural or artificial inorganic materials, which improve the physico-chemical and mechanical properties of the cement such as workability or water retention. They can be inert or have slightly hydraulic, latent hydraulic or pozzolanic properties. They cause no appreciable increase of the water demand of the cement, in addition to not impairing the resistance of the concrete or mortar to deterioration in any way or reducing the corrosion protection of reinforcement. Fillers are normally either limestone or any inert material such as sand. The aim of this investigation is to study the effect of substitution of limestone for Homra in pozzolanic cement. The effect of limestone replacement was studied by the determination of the combined water, free lime contents, bulk density, total porosity and compressive strength. The results show that the addition of limestone reduces the initial and final setting time, as well as total porosity, whereas the free lime and combined water increase with limestone content. It can be concluded that limestone fills the pores between cement particles due to formation of carboaluminate, which may accelerate the setting of cement pastes. (C) 2000 Elsevier Science Ltd. All rights reserved.