【作者】 王业江；

【导师】 杨长辉； 叶建雄；

【作者基本信息】 重庆大学 ， 材料科学与工程， 2011， 硕士

【摘要】 作为电炉法制取黄磷时的工业副产品,我国每年都要产生大量的磷渣。我国多数黄磷生产企业将磷渣作为废渣堆放,这不利于社会和环境的可持续发展。磷渣具有潜在活性,可以作为混凝土掺合料,这是实现磷渣大量有效利用的一种较好的技术途径,具有很高的环境效益、社会效益以及经济效益。磷渣粉掺合料对混凝土的性能有一定影响,目前关于其对水泥水化以及混凝土耐久性,特别是氯离子渗透性能方面研究还较少。本文以四川川辅新材料有限公司磷渣为研究对象,主要研究了磨细磷渣粉对水泥水化、混凝土力学性能、氯离子渗透性能及孔结构的影响。研究结果表明:①磷渣粉延缓了水泥水化。磷渣粉掺入降低了早期的水化热和化学结合水量,减缓了水化放热速率。掺磷渣粉后浆体的水化产物与水泥水化产物类似,但Ca（OH）₂含量降低;②磷渣粉是一种优良的混凝土掺合料,在提高混凝土56d强度方面,其效应要低于矿渣,优于粉煤灰;③磷渣粉的掺入能够显著提高混凝土的抗氯离子渗透性能。在0.55、0.45、0.37水胶比下,磷渣粉掺量在40%以内时,混凝土抗氯离子渗透能力随磷渣粉掺量增大而提高;磷渣粉比表面积在274～453m²/kg范围内时,56d龄期后,混凝土抗氯离子渗透能力随磷渣粉细度增大而提高;④磷渣粉分别与粉煤灰、矿渣按1:1复掺时可提高混凝土的抗氯离子渗透能力;⑤磷渣粉的掺入有利于细化水泥石平均孔径,提高浆体中﹤20nm微孔的比例,改善混凝土孔结构。更多还原

【Abstract】 As a kind of by-products by yellow phosphorus industry through electric furnace process, large amounts of phosphorous slag are produced every year in our country. Phosphorous slag is piled as waste residue in most yellow phosphorus company in our country, which is harmful to the sustainable development of society and environment. Phosphorous slag can be used as mineral admixture because of its hydraulic potential, which is a good way to reusing it largely. At the same time, there are high environment, society and economic benefit if the phosphorous slag is reused recycling.Phosphorus slag has certain influence on the performance as a kind of mineral admixtures. At present, there are very few researches on the influence of phosphorous slag on hydration of cement and durability of concrete, especially on the properties of chloride ion penetration. In this paper, the effect of phosphorous slag produced in Sichuan ChuanFu New Building Materials Co., Ltd on hydration of cement, mechanics properties, properties of chloride ion penetration and pore structure of concrete are studied. The main results show that:①The hydration of cement was delayed as mixing with phosphorous slag. The hydration heat and the non-evaporable water are decreased; meanwhile, the exothermic rate of hydration is been slower when mixing with phosphorous slag. After mixing with phosphorus slag, the hydration products are similar with the hydration products of cement, but the Ca （OH）₂ decreased.②Phosphorus slag is a good kind of mineral admixture of concrete. As a mineral admixture to increase the 56d compressive strength of concrete, the effect of phosphorus slag is lower than blast furnace slag, better than fly ash.③The permeability resistance of concrete against chloride ion penetration increases significantly by adding phosphorus slag. When the water to binder ratio of the mixes are 0.55, 0.45, 0.37 and the content of phosphorus slag within 40%, the permeability resistance of concrete against chloride ion penetration increase as the content of phosphorus slag increase. The resistance to chloride ion penetration of concrete increases with the fineness of phosphorus slag increases after 56d ages when the surface area of phosphorus slag is in the range of 274⁴53m²/kg.④The resistance to chloride ion penetration of concrete increases by mixing phosphorus slag with fly ash or blast furnace slag according to 1:1. ⑤The pore structure of concrete has been improved by mixing phosphorus slag.The average pore diameter decreases and the percentage of the pores with diameter less than 20nm in concrete increases.更多还原