自制硅酸盐对传统糯米灰浆性能的影响

Influence of prepared silicate on properties of traditional sticky rice-lime mortar

采用灰浆性能表征和扫描电镜(SEM)、X射线衍射(XRD)、红外光谱(FTIR)等技术手段,探讨了自制硅酸盐对糯米灰浆的影响及作用机理。结果表明:自制硅酸盐对糯米灰浆的表面硬度、抗压强度、耐冻融性和耐水性均有一定程度的改善。6%自制硅酸盐糯米灰浆的综合性能最佳,其66d抗压强度高达1.41 MPa,耐冻融性较之空白样品提高了133%,耐水性能提高了43.8%。改性糯米灰浆耐水性等性能的提高,可能与灰浆中水化硅酸钙的生成有关。

The influence of prepared silicate on properties of traditional sticky rice-lime mortar and their scientific mechanism are discussed by means of SEM, XRD, and FTIR. Results indicate that silicate are effective to increase the hardness, compressive strength, freezing-thaw resistance and water resistance of sticky rice-lime mortar significantly. The sticky rice-lime mortar with prepared silicate, overall properties of the prepared silicate-sticky rice-lime mortar are very good. Compared with pure sticky rice-lime mortar, the 66 d compressive strength of prepared silicate-sticky rice-lime mortar is 1.45 MPa, and the freeze-thaw resistance and water resistance increase by 133.3% and 43.8% respectively. Formation of tobermorite is possible to account for the good mechanical property of sticky rice-lime mortar with silicate.