摘要
为了促进水泥水化性能,采用共沉淀法制备C-S-Hs-PCE,将其掺入水泥浆体中,研究了水泥浆体流变性及水化性能。结果表明,掺加C-S-Hs-PCE可提高新拌浆体流变性,缩短水化诱导期,促进水泥水化放热。C-S-Hs-PCE提供的晶核促进了水化产物成核生长。随着C-S-Hs-PCE掺量增加,硬化水泥浆体中水化反应产物显著增多,大量水化产物有效填充微观孔隙,水化硬化体系微观结构密实程度提高,水化产物覆盖或生长在未水化颗粒表面,胶凝材料水化产物间黏结紧密,孔隙率显著减少,水泥硬化体系孔结构有效降低,大孔含量减少,纳米孔含量提高。掺加1.0%C-S-Hs-PCE可使得1 d抗压强度提高12.9%,3 d抗压强度提高18.2%,7 d抗压强度提高20.5%,28 d抗压强度提高12.6%。
In order to promote the hydration performance of cement,C-S-Hs-PCE was prepared via co-precipitation method,and was added into cement paste.Based on that,the rheological performance and hydration properties of cement paste were analyzed.The results show that adding C-S-Hs-PCE can improve the rheology of the cement paste.Adding C-S-Hs-PCE could shorten cement hydration induction period and improve the hydration heat release rate significantly.The crystalline nuclei provided by C-S-Hs-PCE promoted the nucleation growth of cement hydration products.When C-S-Hs-PCE content increased,hydration reaction products increased remarkably,a large number of hydration products effectively filled into the micropores.Hydro-chemical products covered or grew on the surface of unhydrated particles,and hydration products bonded closely together,significantly reduced the porosity and micro-cracks,large pore content of coment reduced and nanopore content improved.Adding 1.0%C-S-Hs-PCE increased compressive strength of 1 d,3 d,7 d,28 d by 12.9%,18.2%,20.5%,12.6%,respectively.
作者
何燕
尤春阳
李萌
刘数华
郜志海
石鹏程
He Yan;You Chunyang;Li Meng;Liu Shuhua;Gao Zhihai;Shi Pengcheng(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu 215011;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan,Hubei 430072;Jiangsu Technology Industrialization and Research Center of Ecological Road Engineering,Suzhou,Jiangsu 215011)
出处
《非金属矿》
北大核心
2023年第4期32-35,共4页
Non-Metallic Mines
基金
国家自然科学基金(51808369)
长江科学院开放研究基金资助项目(CKWV20221020/KY)
江苏省研究生科研与实践创新计划项目(SJCX22_1577,SJCX23_1722)。
