摘要
通过试验研究,探讨了超细矿渣的细度和掺量对水泥净浆的流动性、凝结时间、抗压强度、化学结合水量以及对胶砂流动性和抗压强度的影响.试验结果表明:随超细矿渣掺量的提高,水泥净浆和胶砂的流动度均增大,且在试验所采用的掺量条件下,细度较小的超细矿渣对水泥净浆及胶砂流动性的改善效果更好;超细矿渣掺量较低时,掺超细矿渣水泥浆体的初凝时间和终凝时间均缩短,超细矿渣掺量较大时,随超细矿渣掺量的增大,水泥浆体的初凝时间和终凝时间延长,且超细矿渣的细度对试验结果影响不明显;随超细矿渣掺量的增大,水泥浆体和胶砂的3d抗压强度变化较小,28d抗压强度提高;超细矿渣细度较大时,适宜掺量的超细矿渣可以提高水泥浆体和胶砂的早期抗压强度;超细矿渣对硬化水泥浆体的化学结合水量的影响与对抗压强度的影响规律基本一致。
This paper presents the influence of content and fineness of ultrafine slag on the properties of cement pastes and mortars. The flowability of the pastes and mortars increases with the addition of ultrafine slag. With the same ultrafine slag content, the slag of higher fineness improves the fluidity of the pastes and mortars greater. When the content of slag is low, the setting time of pastes is slightly shortened. But, as for the pastes with high content of slag added, the setting time of them is prolonged with the increase of slag content. The non-evaporable water content continuously increases with the increment of curing age. In this paper, the compressive strength of cement pastes and mortars at 28 d improves with the increase of slag content. The early strength of cement pastes or mortars varies slightly. And, when the fineness of the slag added is bigger, it is higher than that of the control. The non-evaporable water content expressed on a unit mass of cement basis has the same law.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2005年第1期25-29,共5页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(50178014)
