Fracture Characterization of Roller Compacted Concrete Mixtures with Blast Furnace Slag and Industrial Sand
Fracture Characterization of Roller Compacted Concrete Mixtures with Blast Furnace Slag and Industrial Sand
复制标题
DOI：
10.6135/ijprt.org.tw/2011.4(4).244
复制
发表时间：
2011-07
影响因子：
--
通讯作者：
Maria da Consolação Fonseca de Albuquerque;J. Balbo;E. Sansone;P. Pinto
中科院分区：
文献类型：
--
作者：
Maria da Consolação Fonseca de Albuquerque;J. Balbo;E. Sansone;P. Pinto
全球能源危机和日益增长的环境问题促使制造商普遍加紧努力，重新利用它们产生的副产品和废物。在冶金领域，钢铁生产会产生炉渣形式的浮渣。在本研究中，碾压混凝土（RCC）混合物制备和砂部分组成的工业砂和粒化高炉矿渣。这些不同的细集料的影响进行了分析的基础上压实参数（水分和干容重），间接抗拉强度，抗弯强度，弹性模量。进行了韧性和断裂试验，测定了混合料的R曲线。结果表明，含矿渣的碾压混凝土混合料的压实用水量增加，抗拉强度和弹性模量下降，扩展能平均值略有增加。参考碾压混凝土和矿渣碾压混凝土呈现出一致向上的R曲线，并且在绝对值上，显示出比文献中先前研究的常规和高强度混凝土更好的R曲线和KR性能。这对于铺路目的非常重要，因为具有这种行为的材料显示出对灾难性裂纹扩展的更大抵抗力，从而延长路面层的使用寿命。
The global energy crisis and growing environmental concerns have prompted manufacturers in general to intensify their efforts to reuse the by-products and wastes they generate. In metallurgy, steel production generates dross in the form of slag. In the present study, roller-compacted concrete (RCC) mixtures were prepared and the sand fraction was composed with industrial sand and granulated blast furnace slag. The influence of these different fine aggregates was analyzed based on the compaction parameters (moisture and dry unit weight), indirect tensile strength, flexural strength, and modulus of elasticity. Toughness and fracture tests were carried out and R-curve was determined for the mixtures. It was found that the RCC mixtures containing slag required larger amounts of water for compaction, presented drops in tensile strength and modulus of elasticity as well as increased the mean values of propagation energy in little amount. Both the reference RCC and the slag RCC presented a consistently upward R-curve and, in absolute values, showed a better R-curve and KR performance than conventional and high-strength concretes previously studied in the literature. This is very important for paving purposes since a material with such a behavior shows greater resistance to catastrophic crack propagation, thus extending the service life of pavement layers.