Diabase Mud-Based Geopolymer Paste: Formulation and Properties

The concepts of sustainability and waste utilization have received urgent attention in the European construction industries. Material selection plays a vital role in the manufacturing process of sustainable building construction. The general objective of this study is the transformation of waste diabase mud into a value-added product. The diabase mud was characterized, and different parameters were selected for the cement, as well as the metakaolin in the mixture. This paper includes analytical research results of a geopolymer paste embedded with diabase mud waste material as its precursor, and a combination of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) as its alkaline activators to form a geopolymeric system. The compressive strength of the optimum mix sample was recorded as 14.0 MPa at 72 h. The embedding of a diabase mud into a geopolymer resulted in a viable composite for use in the construction industry.

Relationship between morphology analysis and durability of geopolymer paste

Geopolymer may improve corrosion protection by slowing the corrosion of steel in concrete or paste. When the alkalinity of the paste is reduced, the passivating layer is destroyed. If the paste is more pores, it can be easily absorbed by NaCl solution or moisture. The improved properties of the geopolymer paste increase its durability by preventing corrosive elements from harming the steel contained within the geopolymer paste. Two types of paste were used in this research which geopolymer paste and Ordinary Portland Cement (OPC) paste. A Scanning Electron Microscope (SEM) was used to determine the surface morphology of geopolymer paste and OPC paste. Based on the result of this investigation, the morphology characterisation is related to the concrete’s endurance. The formation of an aluminosilicate gel during the geopolymerisation process is critical for stability, increasing the geopolymer matrix’s density. As a result, this can increase the durability of geopolymer paste compared to OPC paste which geopolymer also can improve corrosion protection of steel in paste.

Physical Characteristics and Compressive Strength of Na-Geopolymer Paste Designed by a Taguchi Method

Geopolymer paste is a revolutionary building material that the chemical activity of inorganic molecules will create. It is an alternative to traditional Portland cement and is more Eco-friendly. This analysis aimed to classify the mixtures and their process parameters suitable for the development of Geo-polymer paste with one of the ultimate compressive powers, the highest-lowest porosity, and the lowest-lowest final and initial setting time. In the experimental design of the Geo-polymer-based-metakaolin, a Taguchi methodology has been utilized. Five variables parameters were chosen that are mostly to influence the properties of the geopolymer. These are the quantity of Si, alkali, the proportion of alkali reagents, duration of blending, and water amount. These variables’ influence has been calculated at 7 and 28 days on compressive strengths, porosity, density, and setting time. The analysis indicates that the strong compressive strength (115MPa) of Geopolymer paste could be achieved with the formula (1Na2O. Al2O3. 3.8SiO2.xH2O) utilizing suitable processing conditions under which the molar ratio of alkali silicate to alkali hydroxide must be held within the range of 3.25-3.02.