Kogbara Reginald B, Al-Zubi Abdelrahman, Masad Eyad A
Mechanical Engineering Program, Texas A&M University at Qatar, P.O. Box 23874, Education City, Doha, Qatar.
School of Engineering, University of Greenwich, Medway Campus, Chatham, ME4 4TB, UK.
Data Brief. 2024 Aug 6;56:110800. doi: 10.1016/j.dib.2024.110800. eCollection 2024 Oct.
The dataset presented here emanates from preliminary studies that compared the early-age compressive strengths of geopolymer mortars produced from construction and demolition wastes (CDW) commonly found in Qatar using different alkaline activators. Waste concrete, waste bricks and steel slag were used as aluminosilicate sources for the geopolymer mortars. Waste concrete was used as fine aggregate (75 µm to 4 mm), while solid or hollow red clay bricks were used together with steel slag as aluminosilicate powders. Solid red clay brick (75 µm to 1.4 mm) was also considered as fine aggregate. Different alkaline activators including solid powder or ground pellet forms of Ca(OH), CaO, and Ca(OH)-NaOH, NaOH-CaCO and NaSiO-NaCO-Ca(OH) mixtures were employed by just adding water. Both solid powder Ca(OH) and viscous solutions of NaOH and NaOH-NaSiO were also considered as alkaline activators. The geopolymer mortars included small amounts of some other additives such as gypsum, microsilica and aluminium sulfate to enhance the geopolymerization and hydration process. Random proportions of the materials were employed in the range-finding experiments, and the mortars produced were tested for compressive strength. The dataset shows the 7-day compressive strengths and densities of the 40 mixtures tested with mostly ambient temperature (20°C) curing. It also shows such data for mixtures in which variables such as curing at 40°C, mixing with hot water at 50 - 60°C temperature, grading of waste concrete aggregates, and collective grinding of the powdered materials were considered. The data indicates possible early-age compressive strengths of different geopolymer mortar mixture designs and the materials and mixture design methods that can be used to achieve desired early-age strengths from waste concrete and bricks.
本文展示的数据集源自初步研究，该研究比较了使用不同碱性活化剂，由卡塔尔常见的建筑和拆除废物（CDW）制成的地质聚合物砂浆的早期抗压强度。废混凝土、废砖和钢渣被用作地质聚合物砂浆的硅铝酸盐来源。废混凝土用作细集料（75微米至4毫米），而实心或空心红粘土砖与钢渣一起用作硅铝酸盐粉末。实心红粘土砖（75微米至1.4毫米）也被视为细集料。通过仅加水使用了不同的碱性活化剂，包括Ca(OH)、CaO的固体粉末或磨碎颗粒形式，以及Ca(OH)-NaOH、NaOH-CaCO和NaSiO-NaCO-Ca(OH)混合物。固体粉末Ca(OH)以及NaOH和NaOH-NaSiO的粘性溶液也被视为碱性活化剂。地质聚合物砂浆包含少量其他添加剂，如石膏、微硅粉和硫酸铝，以增强地质聚合和水化过程。在探索性实验中采用了材料的随机比例，并对制成的砂浆进行了抗压强度测试。该数据集显示了40种混合物在大多为环境温度（20°C）养护下的7天抗压强度和密度。它还显示了考虑了诸如在40°C养护、在50 - 60°C温度下与热水混合、废混凝土集料的级配以及粉末材料的共同研磨等变量的混合物的此类数据。该数据表明了不同地质聚合物砂浆混合物设计可能的早期抗压强度，以及可用于从废混凝土和砖块中获得所需早期强度的材料和混合物设计方法。
