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The Effects of Aluminium Sulphate on Slag Paste Activated with Sodium Hydroxide and Sodium Silicate

机译:硫酸铝对氢氧化钠和硅酸钠活化的矿渣浆的影响

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摘要

This study investigates the characteristics of alkali-activated slag cement using aluminium sulphate (ALS) as an activator. The alkalis NaOH and Na SiO were used as additional activators (denoted by alkali) at 5% and 10% of the weight of the ground granulated blast furnace slag (GGBFS). Three types of activators were considered. The first was when ALS was used alone. For the second, ALS and 5% alkali were used together. The third was when ALS and 10% alkali were used. ALS was used at concentrations of 2%, 4%, 6%, 8%, and 10% based on binder weight. Experimental results show that when ALS was used as a sole activator, the activity of GGBFS was low and its strength was below 1 MPa. However, compressive strength was improved when 5% or 10% alkali and ALS were used at the same time. This was effective at improving mechanical and microstructural performance when used with an additional activator capable of forming a more alkaline environment than using ALS as a sole activator.
机译:这项研究调查了以硫酸铝(ALS)为活化剂的碱活化矿渣水泥的特性。碱式NaOH和Na SiO用作额外的活化剂(以碱表示),其用量为研磨的粒状高炉矿渣(GGBFS)重量的5%和10%。考虑了三种类型的活化剂。首先是单独使用ALS时。第二,将ALS和5%的碱一起使用。第三是使用ALS和10%的碱。基于粘合剂重量,以2%,4%,6%,8%和10%的浓度使用ALS。实验结果表明,当ALS用作唯一的活化剂时,GGBFS的活性低并且强度低于1MPa。但是,同时使用5%或10%的碱和ALS时,抗压强度得到改善。当与其他活化剂一起使用时,与使用ALS作为唯一活化剂相比,这可以有效改善机械和微观结构性能。

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