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何松松,焦楚杰,李松. 超细辅助胶凝材料对透水混凝土性能的影响[J]. 科学技术与工程, 2020, 20(35): 14660-14667.
hesongsong.Effect of Ultrafine Supplementary Cementitious Materials on thePerformance of Pervious Concrete[J].Science Technology and Engineering,2020,20(35):14660-14667.
超细辅助胶凝材料对透水混凝土性能的影响
Effect of Ultrafine Supplementary Cementitious Materials on thePerformance of Pervious Concrete
投稿时间:2019-12-19  修订日期:2020-08-28
DOI:
中文关键词:  透水混凝土  力学性能 透水率  孔隙率 超细辅助胶凝材料
英文关键词:pervious concrete  mechanical property  permeable rate  porosity  ultrafine supplementary cementitious materials
基金项目:国家自然科学基金项目(51778158;51478128;51278135);广东省水利科技创新重点项目(2017–32);住房与城乡建设部科研开发项目(2010–K3–27;2010–K4–18);广州大学重点产学研项目(2018-14);
        
作者单位
何松松 广州大学土木工程学院
焦楚杰 广州大学土木工程学院
李松 广州大学土木工程学院
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中文摘要:
      透水混凝土被认为是海绵城市建设中管理雨水最佳的路面材料之一,强度和透水性是透水混凝土设计时考虑的两个重要参数,为了平衡透水混凝土强度与透水性能之间关系,本文通过力学和透水试验,研究了四种超细辅助胶凝材料(硅粉、矿粉、乳胶粉、粉煤灰)和四个掺量(5%、7%、9%、11%)对透水混凝土力学性能和透水性能的影响规律。结果表明:掺超细辅助胶凝材料均能提高透水混凝土的抗压、弯拉强度,当硅粉掺量为9%时,透水混凝土28天抗压强度超过35 MPa。透水混凝土的孔隙率和透水率随着超细辅助胶凝材料掺量的增加而降低,当孔隙率控制在18%~19%范围内,可实现透水率和强度的良好平衡。孔隙率与透水率之间呈现指数正相关,与抗压强度和弯拉强度呈现指数负相关,提出了基于孔隙率的透水混凝土力学性能和透水性能评估方程。建立了透水混凝土抗压强度与弯拉强度之间的非线性关系方程,实现了对透水混凝土弯拉强度的预测,通过预测值和实测结果对比验证了方程的可靠性。
英文摘要:
      Pervious concrete is considered as one of the best pavement materials for rainwater management in sponge city construction. Strength and permeability are two important parameters to be considered in permeable concrete design, In order to balance the relationship between strength and permeability of pervious concrete,In this paper, through mechanical and permeability tests, the influence of four ultrafine supplementary cementitious materials (silica powder, slag powder, latex powder, fly ash) and four dosage (5%, 7%, 9%, 11%) on mechanical properties and permeability of pervious concrete was studied. The results show that the addition of ultrafine supplementary cementitious materials can improve the compressive and flexural strength of pervious concrete, when the content of silica powder is 9%, the 28-day compressive strength of pervious concrete more than 35MPa.The porosity and permeability of permeable concrete decrease with the increase of the content of ultrafine supplementary cementitious materials. When the porosity is controlled within 18%~19%, a good balance between permeability and strength can be achieved.There is an exponential positive correlation between porosity and permeability, and an exponential negative correlation between porosity and compressive strength and flexural strength.The nonlinear relation equation between compressive strength and flexural strength of pervious concrete is established, and the prediction of flexural strength of pervious concrete is realized.
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