Anchorage of steel bars in concrete by geopolymer paste
Anchorage of steel bars in concrete by geopolymer paste
复制标题
DOI：
10.1016/j.matdes.2011.01.048
复制
发表时间：
2011-05
影响因子：
8.4
通讯作者：
Smith Songpiriyakij;T. Pulngern;Pompong Pungpremtrakul;C. Jaturapitakkul
中科院分区：
文献类型：
--
作者：
Smith Songpiriyakij;T. Pulngern;Pompong Pungpremtrakul;C. Jaturapitakkul
本文介绍了采用地质聚合物浆料作为粘结剂时埋入钢筋与基底混凝土之间的粘结强度。主要兴趣在于确定作为粘合剂的地质聚合物浆料的合适混合比例。通过改变起始粘合剂材料的量和碱浓度，制备了十二种不同混合比例的地质聚合物浆料，并测试了压缩强度和粘合强度。测试结果表明，RHBA和SF与FA掺合均可用于制备地质聚合物浆料。与 SF 的混合物具有更高的压缩强度和粘合强度，而与 RHBA 的混合物需要更长的固化时间。圆棒和地质聚合物浆体的粘结强度略高于对照混凝土（1.05-1.12 倍），并且变形棒的粘结强度明显较高（1.03-1.60 倍）。还给出了粘合强度与压缩强度的比率。与商业修复材料相比，地质聚合物浆料的粘结强度比环氧树脂高约1.24-1.81倍。这些测试结果表明，使用地质聚合物浆料的粘结强度足够高，可以用作修复工程的粘结材料。建议使用含有高 SF 含量和高 NaOH 浓度的混合物来增强压缩强度和粘合强度。
This paper presents the bonding strength between the embedded rebar and substrate concrete by using geopolymer paste as the bonding agent. The determination of the suitable mix proportions of geopolymer paste as bonding agent was the main interest. Twelve different mix proportions of geopolymer paste by varying the amount of starting binder materials and alkaline concentration were prepared and tested for compressive and bonding strengths. The tested results indicated that both RHBA and SF incorporating with FA could be used in preparation of geopolymer paste. Mixes with SF gave the higher compressive and bonding strengths while the mixes with RHBA required the longer curing time. The bonding strengths of round bar and geopolymer pastes were slightly higher than that of control concrete (1.05–1.12 times) and there were significantly high in case of deformed bars (1.03–1.60 times). The ratios of bonding strength on the compressive strength were also presented. In comparison with commercial repair materials, the bonding strengths of geopolymer paste were higher than those of epoxies about 1.24–1.81 times. These tested results indicated that the bonding strengths using geopolymer paste were high enough and possibly used as bonding material for repair works. The mixtures containing high SF content and high NaOH concentrations were recommended to enhance both compressive and bonding strengths.