Effects of Rice Straw Fibres on the Mechanical Properties and Hydration of Cements  

作　　者：WANG G M ZHANG B 

机构地区：[1]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

出　　处：《武汉理工大学学报》2010年第17期123-126,146,共5页Journal of Wuhan University of Technology

基　　金：supported by"the Fundamental Research Funds for the Central Universities"(No.2010-Ⅳ-057)

摘　　要：The purpose of this research is to study the effects of rice straw fibres (RSF) on the setting time,heat of hydration,hydration products (XRD),mechanical properties for cements. Three types of the cements (P.I.52.5,P.O.42.5,sulphate aluminium) are used in this test. Results show that with the addition of RSF,the setting times for these three kinds of cements are delayed. According to P.O.42.5 cement,The max temperatures of exothermic peak (Tmax) decrease,exothermic peak times (tmax) are delayed and the mechanical strengths generally drop as RSF concentration is increased. XRD test shows that the RSF hinder the formation of Ca(OH)2 phase and hydration of cement (C3S,C2S,C4AF),which resulted in the delay of setting time and hydration reaction.The purpose of this research is to study the effects of rice straw fibres （RSF） on the setting time,heat of hydration,hydration products （XRD）,mechanical properties for cements. Three types of the cements （P.I.52.5,P.O.42.5,sulphate aluminium） are used in this test. Results show that with the addition of RSF,the setting times for these three kinds of cements are delayed. According to P.O.42.5 cement,The max temperatures of exothermic peak （Tmax） decrease,exothermic peak times （tmax） are delayed and the mechanical strengths generally drop as RSF concentration is increased. XRD test shows that the RSF hinder the formation of Ca（OH）2 phase and hydration of cement （C3S,C2S,C4AF）,which resulted in the delay of setting time and hydration reaction.

关 键 词：rice straw fibres CEMENT setting time heat of hydration 

分 类 号：TU528.58[建筑科学—建筑技术科学]