水化硅酸钙组成对蒸压硅酸盐材料力学性能的影响

摘要

In order to explore the influence of hydration products on mechanical properties of autoclaved aerated concrete (AAC),semiquantitative of calcium silicate hydrate composition is analyzed by BET / XRD method,which is used to establish contour maps of the matrix material mechanical properties with various content of calcium silicate hydrate and tobermorite.The relationship between mechanical properties and hydration products of the matrix material was confirmed and the AAC compressive strength model was established.The results indicate that the C-S-H gel and tobermorite of autoclaved aerated concrete contained in silicon sand blocks is higher than that of autoclaved aerated concrete contained in fly ash blocks and the content of calcium silicate gel and the crystal content of tobermorite has a certain function relationship when the substrate compressive strength is optimal.It is indicated that the errors between calculated values of compressive strength and the measured value are less than 2％,which demonstrates the model is reliable.%为探究水化产物对加气混凝土(AAC)力学性能的影响规律,采用BET/XRD半定量水化硅酸钙组成,构建基材力学性能随其水化硅酸钙胶体(C-S-H)含量和托勃莫来石含量变化的等值线图,确定基材力学性能与水化产物的关系,建立AAC抗压强度模型.结果表明:砂质AAC中胶体及晶体含量明显高于粉煤灰质AAC;基材抗压强度最优时,水化硅酸钙胶体含量和托勃莫来石晶体含量有着一定的函数关系.抗压强度模型验证表明抗压强度计算值与实测值误差小于2％,抗压强度模型比较可靠.