含水率对微波烧结渣土砖力学性能影响的研究

Study on Influence of Moisture Content on Mechanical Properties of Microwave Sintered Slag Soil Bricks

本文基于微波烧结技术,利用工程渣土为原材料,对4种不同含水率试块进行烧结。测试了烧结产品的物理、力学性能及显微结构。试验结果表明,微波烧结会使试块体积膨胀,含水率越高的试块经过微波烧结后体积膨胀率越高,同时其质量损失与孔隙率也越大。但烧结产品的强度并不总随孔隙率增大而降低,抗压强度最高的试块其微观结构中观测到更多的熔融物,可对微孔隙以及粗颗粒起到填充加固、粘合固结的作用,因此强度也更高。

Based on the microwave sintering technology,this paper uses engineering slag as raw material to sinter four test blocks with different moisture content and tests the physical,mechanical properties and microstructure of sintered products.The test results show that microwave sintering will make the volume expansion of the test block.The higher the moisture content,the higher the volume expansion rate of the test block after microwave sintering,and the greater the mass loss and porosity.However,the strength of sintered products does not always decrease with the increase of porosity.More molten substances are observed in the microstructure of the test block with the highest compressive strength,which can play the role of filling,strengthening and bonding consolidation for micropores and coarse particles,so the strength is also higher.