聚合物乳液改性含钛高炉渣免烧砖

用聚苯乙烯乳液、聚乙酸乙烯酯乳液和苯丙乳液等改性含钛高炉渣浆分别得到免烧免蒸砖试样. 考察了影响试样性能的主要因素和改性机理. 结果表明，聚乙酸乙烯酯乳液改性渣浆试样性能较好，苯丙乳液改性效果最好. 当含钛高炉渣为72%(w,下同)、苯丙乳液为10%、添加剂为18%、成型压力为30 MPa、养护时间为7 d时，渣浆试样的抗压强度和抗折强度分别达到37.7和13.9 MPa. 机理探索表明，苯丙乳液中酸根离子与渣浆中金属离子交联生成了金属络合物.

Preparation of Non-autoclaved and Unburnt Bricks by Modifying Ti-bearing Blast Furnace Slag Pastes with Polymer Emulsion

Ti-bearing blast furnace slag pastes were modified with PS (polystyrene), PVAC (polyvinyl acetate) and SAE (styrene-acrylate emulsion) respectively, to prepare the non-autoclaved and unburnt bricks. The major factors influencing the properties of the products and the modification mechanism were investigated. The samples modified with SAE and PVAC show better properties than those with PS. Being the best modifying agent of the three, SAE addition results in the samples with a compressive strength 37.7 MPa and flexural strength 13.9 MPa, when the samples have a composition of slag 72%, SAE 10% and additive 18%, is cast at pressure 30 MPa and cured for 7 d. The study reveals that the acid radicals in SAE react with the metal ions in the slag to form complex compounds.