掺加钢纤维抑制住宅楼(屋)面细石混凝土开裂试验研究  

Experimental Study on Adding Steel Fiber to Inhibit the Cracking of Fine Stone Concrete on the Surface of Residential Building(Roof)

作　　者：徐大为 潘峰 王兆 XU Dawei;PAN Feng;WANG Zhao(Shanghai Construction No.5(Group)Co.,Ltd.,Shanghai 200062,China)

机构地区：[1]上海建工五建集团有限公司,上海200062

出　　处：《工程质量》2023年第S01期69-74,共6页Construction Quality

摘　　要：针对住宅楼(屋)面细石混凝土保护层的开裂问题,开展了掺加不同掺量钢锭铣削型钢纤维细石混凝土和传统工艺的内配钢丝网片细石混凝土的工程试验。试验结果表明:传统的钢丝网片细石混凝土保护层抗裂性能满足不了新的结构形式对抗裂性能的要求。针对无机保温砂浆、XPS板、EHS纳米橡塑保温垫等三种常用保温材料,实际应用钢纤维细石混凝土施工保护层时,观测28 d完全无裂缝产生。在细石混凝土中钢纤维掺量为30 kg/m^(3)时,即可以达到控制细石混凝土保护层开裂的目的。试验结果为解决住宅楼、屋面细石混凝土开裂问题提供了技术支撑。Aiming at the cracking problem of the protection of the stone concrete layer of the residential building(roof),the project of the steel-milled steel-stone concrete with different additions and the inner-distribution mesh shard fine concrete of the traditional process was carried out.The experimental results show that:The crack resistance of the traditional steel wire mesh fine stone concrete protective layer cannot meet the requirements of the new structural form;and for various nano-scale thermal insulation materials such as inorganic thermal insulation mortar,XPS cracks,and concrete tensile mesh required by EHS,when the steel fiber fine stone concrete is practically applied,the production of concrete without dense layer is completely protected every 28 days.When the control amount of steel in the fine stone is 30kg/m^(3),the purpose of cracking the concrete layer of the stone concrete can be achieved.The test provides a small support technology for solving the cracking problem of building and roofing stone concrete in residential buildings.

关 键 词：细石混凝土 混凝土开裂 钢纤维 住宅楼(屋)面 

分 类 号：TU745[建筑科学—建筑技术科学] TU511