文档介绍：学号: 成绩:
土木工程专业
毕业设计(论文)
水泥混凝土路面快速修补材料的研究
专业方向: 土木与交通工程(道路桥梁)
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二零一零年六月
水泥混凝土路面快速修补材料试验研究
摘要
本文以硫铝酸盐水泥(SAC)为主要研究基材,通过普通硅酸盐水泥(OPC)、高铝水泥(HAC)与SAC标准稠度和凝结时间的比较;在SAC中掺入不同比例的OPC和在SAC中掺入不同比例的HAC研究其复合后的凝结时间和早期强度性能变化;添加不同外加剂对SAC水泥的凝结时间和早期强度的影响,得出一定的结论,并以此实际出合理的配合比。
试验结果表明:在SAC中掺入OPC,OPC掺量在10%~80%范围内都会引起水泥凝结时间加快,抗压强度和抗折强度降低,有时甚至达到速凝。其中,当OPC掺量在10%~20%时,其凝结时间显著缩短,早期抗折强度略有增加,后期强度略有降低但不是很明显。当OPC掺量在40%~50%时,水泥发生了速凝,且强度降低较为明显。当OPC掺量大于90%时,混合水泥的凝结时间和强度与OPC水泥接近;在SAC中掺入HAC,随着HAC掺量的增加会引起水泥凝结时间有略微提升,抗压强度和抗折强度都有所下降;在SAC中掺入适量的JG-2在标准稠度用水量下能起到加速水泥水化的作用,缩短水泥终凝时间,过量的JG-2则会延缓水泥凝结;缓凝剂A能起到延缓SAC凝结的作用,且适量的A能提高的SAC的3d强度;葡萄糖酸钠能很好的延缓SAC凝结的速度,适当的添加葡萄糖酸钠也可以使SAC的3d强度得到提升;BS型速凝早强剂能显著缩短SAC的凝结时间,微量的BS便能使水泥发生速凝,提高小时强度,但掺量较大时会降低水泥的中、后期强度。最终选定:,砂率38%,JG-%,%%。水泥混凝土的施工时间为55min,。
关键词:硫铝酸盐水泥;复合水泥;外加剂;凝结时间;力学性能;配合比
ABSTRACT
In this paper, sulfur Cement (SAC) as the main research base material, by ordinary Portland cement (OPC), high alumina cement (HAC) and SAC normal consistency and setting time parison; in SAC mixed with different proportions SAC mixed with OPC and HAC of different proportions of pound after setting time and early strength performance changes; adding different additives on the SAC cement setting time and early strength, draw some conclusions, and thus the actual a reasonable mix.
The results showed that: in the SAC mixed with OPC, OPC content of 10% to 80% range would give rise to accelerate cement setting time, compressive strength and flexural strength decreased, sometimes even to the rapid setting. Which, when the OPC content of 10% to 20%, the setting time was significantly shorter, a slight increase in flexural strength of early and late strength decreased slightly but not very obvious. When the OPC content of 40% to 50%, the occurrence of a rapid setting cement and the intensity decreases more distinctly. When the OPC content greater than 90%, the mixed cement setting time and strength and OPC cement