BFRP筋无机聚合物混凝土在江海堤围建设中的应用
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摘要
在滨海和海洋环境下,钢筋混凝土结构面临混凝土材料的腐蚀和钢筋锈蚀的问题,严重威胁结构的安全。拟采用玄武岩纤维(BFRP)筋替代钢筋,无机聚合物替代硅酸盐水泥,制备BFRP筋无机聚合物混凝土结构。结果表明:BFRP筋具有优异的力学性能,在模拟海水中浸泡1 a,其拉伸强度仍高于常规钢筋;无机聚合物混凝土具有优异的抗海水侵蚀性能,其抗氯离子渗透性能和抗硫酸盐侵蚀性能明显优于普通混凝土。将BFRP无机聚合物混凝土应用于广东省惠来县西港海堤建设中,现场检测结果表明:无机聚合物混凝土工作性能和力学性能均达到设计要求;面板表面结构致密,施工效果良好。
In the coastal and marine environment, reinforced concrete structures suffered with corrosion of concrete materials and corrosion of steel bars, which seriously threatened the safety of building structures. In this study, basalt fiber( BFRP) bars were used to replace steel bars, and geopolymer was used to replace Portland cement to prepare BFRP bars geopolymer concrete. The results indicated that BFRP bars possessed excellent mechanical properties, and the tensile strength of BFRP bars soaked in simulated seawater for one year was still higher than that of steel bars. Geopolymer concrete showed up excellent seawater corrosion resistance, and its chloride ion penetration resistance and sulfate corrosion resistance were obviously superior to ordinary concrete. BFRP reinforced geopolymer concrete was applied to the seawall construction in Huilai County, Guangdong Province. The performance and mechanical properties of the geopolymer concrete met the design requirements; the surface structure was compact and the construction effect was good.
In the coastal and marine environment, reinforced concrete structures suffered with corrosion of concrete materials and corrosion of steel bars, which seriously threatened the safety of building structures. In this study, basalt fiber( BFRP) bars were used to replace steel bars, and geopolymer was used to replace Portland cement to prepare BFRP bars geopolymer concrete. The results indicated that BFRP bars possessed excellent mechanical properties, and the tensile strength of BFRP bars soaked in simulated seawater for one year was still higher than that of steel bars. Geopolymer concrete showed up excellent seawater corrosion resistance, and its chloride ion penetration resistance and sulfate corrosion resistance were obviously superior to ordinary concrete. BFRP reinforced geopolymer concrete was applied to the seawall construction in Huilai County, Guangdong Province. The performance and mechanical properties of the geopolymer concrete met the design requirements; the surface structure was compact and the construction effect was good.
引文
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[7]杨永民,李兆恒,张同生,等.活性氧化镁补偿无机聚合物浆体收缩的作用机制[J].华南理工大学学报(自然科学版),2017(9):102-109.
[2]江洧.《广东省海堤工程设计导则(试行)》编制体会[J].水利技术监督,2005,13(3):29-33.
[3]严纬粤.全省加快水利工程建设暨千里海堤加固达标工程现场推进会在阳江召开[J].广东水利水电,2012(9):96.
[4]张婷,刘达,李德吉.强台风“天兔”过后海堤损毁原因分析及海堤建设管理建议[J].水利建设与管理,2015,35(7):25-27.
[5]李兆恒,杨永民,陈晓文,等.MgO对无机聚合物胶凝材料性能的影响及压蒸安定性评价[J].广东建材,2017,33(2):6-9.
[6]杨永民,李兆恒,蔡杰龙,等.无机聚合物混凝土配合比设计方法研究[J].广东水利水电,2017(3):27-34.
[7]杨永民,李兆恒,张同生,等.活性氧化镁补偿无机聚合物浆体收缩的作用机制[J].华南理工大学学报(自然科学版),2017(9):102-109.