碱渣海相软土混合料烧结砖试验研究

Experimental Study on Sintered Brick with Alkali Slag Marine Soft Soil Mixture

工业碱渣为制碱过程中产生的废弃物,目前常见的处理方式为堆放,不仅耗费了土地资源,且对环境造成一定的影响。为了实现工业碱渣的资源化再利用,利用工业碱渣与海相软土混合料进行烧结砖试验。试验表明,海相淤泥单烧后抗压强度仅为14.28 MPa,随着碱渣掺量的提高,其强度随之增大。碱渣含量为15%时,烧结砖抗压强度可达21.42 MPa,碱渣的掺入能大幅度提高烧结强度,且线缩率、烧失率、吸水率等技术指标都能满足普通烧结砖的规范要求。

Industrial alkali slag is the waste produced in the process of soda production.The current common treatment method is stacking,which not only consumes land resources but also has a certain impact on the environment.In order to realize the recycling of industrial alkali slag,the mixture of industrial alkali slag and marine soft soil is used to test sintered bricks.The test shows that the compressive strength of marine silt after single firing is only 14.28 MPa,and with the increase of alkali slag content,its strength increases.When the alkali slag content is 15%,the compressive strength of the sintered brick can reach 21.42 MPa.The incorporation of alkali slag can greatly improve the sintering strength.Moreover,the indexes such as the linear shrinkage rate,the burnout rate and the water absorption rate can meet the specification requirements of ordinary sintered bricks.