The Effect of Basalt Fiber on Concrete Performance under a Sulfate Attack Environment  

作　　者：Qiang Su Jinming Xu 

机构地区：[1]Department of Civil Engineering,Shanghai University,Shanghai,200444,China

出　　处：《Journal of Renewable Materials》2023年第1期233-244,共12页可再生材料杂志（英文）

基　　金：supports for the study were provided by the Natural Sciences Foundation Committee of China(Grant No.41472254,Jinming Xu,http://www.nsfc.gov.cn)。

摘　　要：To enhance the sulfate attack resistance performance of concrete,Sulfate erosion test was carried out on basalt fiber concrete with different contents,selecting a concentration of 5%sulfate solution and using a dry−wet cycle mechanism attack of basalt fiber-reinforced concrete(BFRC).Every 15 dry−wet cycles,the mass,compressive strength,splitting tensile strength,and relative dynamic elastic modulus of BFRC were tested,and the SO_(4)^(2−)con-centration was measured.This work demonstrates that the mass,relative dynamic elastic modulus,compressive and splitting tensile strength of BFRC reveal a trend of climb up and then decline with the process of the dry−wet cycle.Basalt fiber can enhance the sulfate corrosion resistance of concrete by delaying the erosion of concrete induced by SO_(4)^(2−)and increasing the bearing and anti-deformation capacities of concrete by improving its inter-nal structure.Additionally,when mixing 0.2%basalt fiber into concrete,the strength deterioration rate will be reduced when the peak values of splitting tensile and compressive strength appear at 60 and 75 times the alter-nating dry−wet cycles,respectively.Adverse effects will occur when the fiber volume fraction exceeds 0.2%.The research in this paper can provide a foundation for the engineering applications of basalt fiber concrete.

关 键 词：CONCRETE basalt fiber dry−wet cycle compressive strength splitting tensile strength 

分 类 号：TU528[建筑科学—建筑技术科学]