水泥-膨胀剂-磨细矿渣复合胶凝材料膨胀与强度发展的协调性研究

COORDINATION BETWEEN EXPANSION AND STRENGTH DEVELOPMENT OF CEMENT- EXPANSIVE AGENT - BLAST FURNACE SLAG TERNARY CEMENTTTIOUS MATERIALS

研究了水泥-膨胀剂二元复合胶凝材料和水泥-膨胀剂-磨细矿渣三元复合胶凝材料,这两种胶凝材料可以用于制备具有良好体积稳定性的高性能膨胀混凝土(HPEC)。研究表明,存在一个最优辅助胶凝材料掺量组合,在此条件下胶凝材料具有良好的膨胀与强度的协调性,在水泥-膨胀剂体系中,膨胀剂的掺量范围在6％～1296,其中掺6％～8％时用于配制补偿收缩混凝土,掺8％～12％时用于配制填充性膨胀混凝土。在水泥-膨胀剂-矿渣体系中,矿渣的掺量范围是20％～40％,对应膨胀剂的掺量及胶凝材料的适用范围为:膨胀剂6％～10％时用于配制补偿收缩混凝土,掺8％～15％时用于配制填充性膨胀混凝土。矿渣的掺入可以削减由于膨胀剂过量而导致的过高的膨胀率,从而避免由此造成的膨胀破坏现象。

The expansion and strength of both C - CSA binary cementitious material and C - CSA - BFS ternary cementitious material were investigated . It is indicated that there is an ideal composition by which cementitious materials will have excellent coordination between expansion and strength. In the C- CSA system, the CSA dosage range in 6%-12%. 6%-8% CSA dosage is suited to shrinkage compensation concrete while 8%-12% CSA dosage is suited to filler concrete. In the C- CSA- BFS system, the BFS dosage range is 20%-40% and the corresponding CSA dosage and suited range are as following: 6%-10% CSA dosage is suited to shrinkage composition concrete while 8%-15% is suited to filler concrete. The excess expansion ratio led by the exceed expansion a-gent can be cut by the BFS and the expansive wreck caused by high expansion ratio can also be reduced.