钢纤维自应力混凝土膨胀变形试验研究  

STEEL FIBER REINFORCED SELF-STRESSING CONCRETE EXPANSIVE DEFORMATION TEST RESEARCH

作　　者：何化南[1,2] 陈旭[1] 李猛[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]深圳市土木工程耐久性重点实验室深圳大学,广东深圳518061

出　　处：《低温建筑技术》2014年第8期4-6,共3页Low Temperature Architecture Technology

基　　金：国家自然科学基金资助项目(基于钢纤维自应力混凝土的桥梁体系转换加固的传力机理和设计理论;51108054;桥梁体系转换加固的非预应力法计算理论与试验研究;SZDCCE11-KF-01)

摘　　要：钢纤维自应力混凝土是能够提高混凝土构件抗裂能力的高性能材料,但在之前的研究中钢纤维的含量都是在80kg/m^3以上.近年来随着钢纤维性能的提高和施工工艺的改进和成熟,现在工程中常用的钢纤维掺量从早期的80～160kg/m^3降为20～80kg/m^3,为适应现在实际工程的需求,文中试验设计了包括2个配筋率3个钢纤维体积掺量系列钢纤维自应力混凝土试件,测量这些试件在养护期间的限制膨胀变形,讨论了限制变形的发展规律,为钢纤维自应力的应用提供可靠依据.Steel fiber reinforced self-stressing concrete is a type of high performance concrete material which is able to enhance the crack resistance of concrete,however the previous research was focused on the steel fiber content over 80kg/m^3.Recent years,due to the improvement of steel fiber properties and construction technology,in engineering the common contents of steel fiber have been reduced from 80-160kg/m^3 to 20-80kg/m^3.Therefore,to meet the practical demand,this paper carried out a series of test on the restricted expansive deformations of the steel fiber reinforced self-stressing concrete with different reinforcement ratios and steel fiber contents including 2 reinforcement ratios and 3 steel fiber contents.The law of development of restricted deformation is discussed with ages and the restricted range.

关 键 词：限制膨胀变形 钢纤维 自应力 低掺量 

分 类 号：TU528.572[建筑科学—建筑技术科学]