复合墙体填充芯层用气泡混合土碳化性能试验  

Experimental Study on Carbonization Performance of Foamed Mixture Lightweight Soil for Filling Core Layer of Composite Wall

作　　者：陈雅妮 杨伟军 杨建宇 CHEN Yani;YANG Weijun;YANG Jianyu(School of Civil Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《湖南科技大学学报(自然科学版)》2024年第4期46-52,共7页Journal of Hunan University of Science And Technology:Natural Science Edition

摘　　要：为了研究用于轻钢龙骨复合墙体填充芯层气泡混合轻质土的碳化性能,在快速碳化试验的基础上,制备不同成分比例的气泡混合轻质土,研究其碳化系数及碳化深度随时间变化的规律,探讨原料土、粉煤灰及气泡含量对轻质土碳化性能的影响,并根据自然条件下与快速碳化试验碳化速率系数的关系,通过碳化试验数据推算出自然条件下轻质土的碳化深度,预测轻质土及复合墙体的碳化寿命.结果表明:原料土掺量、粉煤灰与原料土掺量比及气泡掺量均对轻质土的碳化性能存在不同程度的影响,原料土掺量及气泡掺量越大,轻质土的碳化系数越小,碳化速率越快;加入适量粉煤灰可以提高轻质土的抗碳化性能并延缓完全碳化时间;通过优化设计配比及提高养护环境等方式,轻质土及其复合墙体的服役寿命可满足设计要求.In order to study the carbonization performance of foamed mixture lightweight soil used in the filling core layer of light steel keel composite wall,based on rapid carbonization test,foamed mixture lightweight soil with different composition ratios is prepared in this paper.By studying the variation law of its carbonization coefficient and carbonization depth along with time,it discusses the influence of raw material soil,fly ash and foam content on the carbonization performance of foamed mixture lightweight soil.According to the relationship between the carbonization rate coefficient under natural conditions and rapid carbonization test conditions,it figures out the carbonization depth of foamed mixture lightweight soil under natural conditions through carbonization test data,and predicts the carbonization life of foamed mixture lightweight soil and its composite wall.Results show that the mixing amount of raw soil,the mixing amount ratio of fly ash to raw soil and the foam content all have different degrees of influence on the carbonization performance of foamed mixture lightweight soil.The higher the mixing amounts of raw soil and foam,the lower the carbonization coefficient of foamed mixture lightweight soil,and the faster the carbonization rate.Adding a proper amount of fly ash can improve the carbonization resistance of foamed mixture lightweight soil and delay the complete carbonization time.In addition,the service life of foamed mixture lightweight soil and its composite wall can meet the design requirements by optimizing the design ratio and improving the maintenance environment.

关 键 词：气泡混合轻质土 轻钢龙骨复合墙体 碳化系数 碳化深度 碳化寿命 

分 类 号：TU525[建筑科学—建筑技术科学]