水泥夯土材料抗压强度试验及耐久性研究 *

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水泥夯土材料抗压强度试验及耐久性研究 *

Experimental Study on Compressive Strength and Durability of Rammed Cement Soil Materials

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宋逸飞¹ , 郭庆军¹ , 刘挺² , 张坤³ , 闫蕊鑫¹ , 李蕊彤¹

摘要：为研究水泥改性夯土材料的力学性能，依据粒径和水泥含量不同制备了 8 种试件，在不同养护环境下养护5 年后，对其进行抗压强度试验和表观耐久性评估，探究不同粒径和水泥含量对抗压强度和表观耐久性的影响。结果表明：水泥夯土材料强度与含水率、粒径分布、水泥掺量、养护方法和放置年限等因素相关；随时间积累试件抗压强度不断增加，但 28 d 室外养护试件强度显著下降；水泥掺量越大抗压强度就越大，室内养护试件强度大于室外养护试件强度；不添加砾石的试件表观耐久性优良，砾石掺量过高试件表观较差。

关键词：水泥夯土；耐久性；抗压强度；季节性条件；自然气候条件

中图分类号：TU521 . 3

文献标志码：A

文章编号： 1005- 8249 (2024) 04- 0001-05

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.04.001

SONG Yifei ¹ , GUO Qingjun¹ , LIU Ting² , ZHANG Kun³ , YAN Ruixin¹ , LI Ruitong¹

( 1 . Xi ’an Gongye University Institute of Civil Engineering College , Xi ’an 710021 , China;

2. Zhonglian Northwest Engineering Design and Research Institute Co. ，Ltd. ，Xi ’an 744000 , China;

3 . Xi ’an Shiyou University Civil Engineering College , Xi ’an 710065 , China)

Abstract : In order to study the mechanical properties of cement - modified rammed earth materials， 8 specimens were prepared according to different particle size and cement content on comprehensive strength and apparent durability.The results show that the strength of cement rammed earth is related to water content, particle size distribution,cement content,curing method and placement time.The comprehensive strength of the specimen increased with timen accumulation,but the strength of the specimen under outdoor curing for 28 days decreased significantly.The grester the cement content ,the greater the compressive strength,and the compressive of indoor curing specimen is greater than that of outdoor curing specimen.The apparent durability of the specimen without gravel is good,but the appearance of the specimen with high grave content is poor.

Keywords : rammed soil mixed with cement; durability; compressive strength; seasonal conditions; natural climatic conditions

*基金项目：国家自然科学基金项目 (42007257) ; 陕西省自然科学基础研究计划项目 (2022JQ- 562) ; 西安市科技计划项目 (2022JH- RYFW- 0125) ; 渭南市重点研发计划 (2023ZDYFJH- 490) 。

作者简介：宋逸飞 (1999—) , 男，硕士研究生，研究方向：砌体结构和生土建筑。

收稿日期：2023- 05- 09