Use of Industrial Waste Slag in Alkali-Activated Slag Ceramsite Concrete Hollow Blocks

Abstract

In this paper, a parametric experimental study developing the alkali-activated slag concrete hollow block (AASCHB) is discussed. Fourteen trial mixes of alkali-activated slag concrete containing pottery sand and ceramsite with different water-to-slag ratios, sand ratios, silicate moduli, and Na2O contents were evaluated to determine the optimal mix for high compressive strength and low drying shrinkage. All four factors evaluated were found to be significant for the desired properties. A series of 390 × 190 × 190 mm3 AASCHBs were prepared using the optimal mix with a water-to-slag ratio of 0.35, sand ratio of 0.64, silicate modulus of 1.2, and Na2O content of 8%. The compressive strength, flexural strength, water absorption, and moisture content tests of these blocks indicate that the resulting AASCHB can be classified under the strength grade of MU15 as a load-bearing hollow concrete block. The proposed AASCHBs appear to provide a viable solution to the environmental problems of industrial waste and cement production emissions, leading to more sustainable buildings without compromising structural performance.

Structural Optimization and Application Research of Alkali-Activated Slag Ceramsite Compound Insulation Block Based on Finite Element Method

“…It occupies a large share of the construction market because of its good heat insulation and thermal insulation, lightweight, high strength, long service life, simple construction, etc. [11]. Commonly, cement is chosen as the cementitious material for self-insulation blocks [12].…”

“…In recent years, alkali-activated slag cementitious material (AASCM) obtained using slag (industrial waste) attracted increasing attention [11]. Compared to the traditional cement production process, the AASCM production process transfers from "two grindings and one burning" to "one grinding".…”

“…Nevertheless, there are a few reports on AASCCIBs [11,19] which focus on the preparation and performance of the block. In other words, there are very few studies devoted to the structural optimization and application feasibility of AASCCIBs [19], especially those dedicated to the comprehensive optimization of mechanical and thermal performances and the exploration of the thermal insulation effect.…”

Experimental Study on Performance Influencing Factors and Reasonable Mixture Ratio of Desert Sand Ceramsite Lightweight Aggregate Concrete

“…Nowadays, this concrete type has become the second most widespread type after ordinary concrete, owing to its advantages of low weight, high strength, and low thermal conductivity, amongst others [1][2][3]. e application of this concrete to new wall materials, such as lightweight wallboards and hollow blocks, can not only effectively reduce the weight and improve the seismic performance of buildings but also significantly improve the energy efficiency of the building [4][5][6][7][8]. Additionally, using local resources to develop new building materials is also an effective way to improve the energy efficiency of buildings.…”

Mechanical Properties and Resistance to Acid Corrosion of Polymer Concrete Incorporating Ceramsite, Fly Ash and Glass Fibers

“…Sludge ceramsite, produced from dried sewage sludge, clay and water glass (liquid sodium silicate) [17,18] is a pure material. Ceramsite has been used as an aggregate [19,20,21] that produces low-weight and relatively cheap concrete. However, the use of ceramsite may decrease both the compressive strength and the flexural strength of the concrete.…”