硅灰、偏高岭土对无机人造石材强度的影响

硅灰和偏高岭土作为无机粘结材料掺入无机人造石中，不仅能替代部分水泥，还能改善无机人造石的强度。本文研究了不同掺量硅灰和偏高岭土对人造石材工作性能和力学性能的影响趋势。结果表明，利用偏高岭土和硅灰制备无机人造石会降低其工作性能，且偏高岭土对混合料工作性能的影响较硅灰略大；随着掺量的增加，强度呈先增大后降低趋势，在掺量为3%时，弯曲强度和压缩强度达到最大。同时，偏高岭土和硅灰对人造石的压缩强度影响显著，其中偏高岭土对人造石早期压缩强度影响更显著，其在对早期强度要求较高的工程中有一定的优势。

Effect of silica fume and metakaolin on strength of inorganic artificial stone

Silica fume and kaolinite mixed into inorganic artificial stone as inorganic binder materials can not only replace part of cement, but also improve the strength of stone. This paper focuses on the effect of different doses of silica fume and kaolinite on the workability and mechanical properties of artificial stone respectively. The results show that the use of kaolinite and silica fume in the preparation of inorganic artificial stone reduces its working properties, and kaolinite has a slightly greater impact on the working properties of the mixture than silica fume. With the increase of the doping amount, the strength shows a trend of first increasing and then decreasing, and the bending strength and compression strength reaches the maximum at 3% doping amount. Meanwhile, kaolinite and silica fume have significant effects on the compressive strength of inorganic artificial stone, especially the effect of kaolinite on the early compressive strength of stone, which has certain advantages in the projects with high requirements for early strength.