摘要
以自制的高分子吸水树脂 (SAP)作为新型的水泥基材料自养护外加剂 .利用吸水树脂优良的保水性能来抑制水泥水化早期干燥现象 ,为水化提供较长时间内持续、稳定的水分供应及充分的内部相对湿度 ,保证水化反应的顺利进行 ,达到自养护的目的 .考察了掺加吸水树脂的水泥试样的强度、流动度、凝结时间等性能 ,并通过测定化学结合水量研究了吸水树脂对水泥水化作用的影响 .结果表明掺加SAP能够提高水泥净浆的水化程度和胶砂试样的机械强度 ,尤其是对 3天、7天和 2 8天三个龄期的抗折强度均可提高10 %～ 2 0 %.
Superabsorbent polymers(SAP) were prepared and used as a novel self-curing admixture in cement-based materials. SAP has good capability of absorbing and retaining water. It can restrain the desiccation in the early age of the cement hydration,and can offer sufficient moisture to keep the internal relative humidity in system in a rather long period of time. So the reaction of hydration is improved and the self-curing process thus rea- lized.The effects of SAP on the fluidity,setting time,strength properties of cement-based materials,and also on the hydration reaction by measuring the chemical bonding water amount were discussed. It is observed that the addition of SAP can improve both the hydration degree of cement paste and the mechanical properties of mortar.The bending strengths in particular,are all improved by 10%～20% in 3 days,7 days and 28 days.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第11期41-44,共4页
Journal of South China University of Technology(Natural Science Edition)
关键词
吸水树脂
水泥基材料
自养护外加剂
水化
superabsorbent polymer
cement-based material
self-curing admixture
hydration
