PDF(Pubmed)
Abstract：
Alkali Activated Slag Concrete (AASC) has been a sustained research activity over the past two decades. Its promising characteristics and being environmentally friendly compared to Ordinary Portland Cement made AASC of exceptional interest. However, there is still no firm mix design, for the AASC, that can provide desirable fresh and hardened properties based on the composition of the binder and activator. This research specifically aims to investigate the affecting parameters on the slump and compressive strength of alkali-activated slag/lime-based concrete and provide a better understanding of the potential reasons for these characteristics. The experimental program consisted of two stages; the first stage studied the effect of different binder and activator compositions, and the second stage studied the water-to-binder ratio and binder content effects on the slump and compressive strength of alkali-activated slag/lime-based concrete. The binder and activator compositions were defined through two main parameters, the hybrid factor (HF = CaO/Si2O + Al2O3) and the solution modulus (Ms = SiO2/Na2O). The compressive strength, initial slump, and slump loss were measured to evaluate the different mixes and specify the optimum range of compositions. Based on the studied parameters, the effective range to achieve desirable slump and concrete compressive strength is from HF 0.6 up to 0.8 at Ms 1.5, this would achieve a compressive strength of more than 30 MPa and a slump of 100 mm after 90 min.
摘要：
在过去的二十年中，碱活性矿渣混凝土（AASC）一直是一项持续的研究活动。与普通波特兰水泥相比，其具有良好的发展前景和环保性，使AASC引起了极大的兴趣。然而,仍然没有牢固的混合设计，对于AASC来说，基于粘合剂和活化剂的组成,其可以提供期望的新鲜和硬化性质。这项研究专门旨在研究影响参数的坍落度和抗压强度的碱活化矿渣/石灰基混凝土，并提供了一个更好的理解这些特性的潜在原因。实验程序包括两个阶段;第一阶段研究了不同的粘合剂和活化剂组成的影响，第二阶段研究了水胶比和粘结剂含量对碱矿渣/石灰基混凝土坍落度和抗压强度的影响。通过两个主要参数定义粘合剂和活化剂组成，混合因子(HF=CaO/Si2O+Al2O3)和溶液模量(Ms=SiO2/Na2O)。抗压强度，最初的低迷，测量和坍落度损失以评估不同的混合物并指定组合物的最佳范围。根据所研究的参数，达到所需坍落度和混凝土抗压强度的有效范围是在1.5Ms下从HF0.6到0.8，这将达到超过30MPa的抗压强度和90分钟后100mm的坍落度。
