Influence of Activation Methods on Strength and Chloride Resistance of Concrete Using Calcium Carbide Residue–Fly Ash Mixture as a New Binder

Dueramae, Saofee; Tangchirapat, Weerachart; Chindaprasirt, Prinya; Jaturapitakkul, Chai

doi:10.1061/(asce)mt.1943-5533.0001808

Cited by 15 publications

(4 citation statements)

References 24 publications

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“…Due to its high pH value, CCR raises the alkalinity of the disposal area. It also causes health threats as it flies as dust into the environment [7,10,11]. Therefore, there is a need for proper utilization of CCR, and one of the effective ways is by applying it to cementitious materials such as concrete, mortar, geopolymer concrete, or soil stabilization.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Durability Performance of Concrete Containing Calcium Carbide Residue and Nano Silica

et al. 2021

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Calcium carbide residue (CCR) is the end-product of production of acetylene gas for the applications such as welding, lighting, ripening of fruits, and cutting of metals. Due to its high pH value, disposing of CCR as a landfill increases the alkalinity of the environment. Therefore, due to its high calcium content, CCR is mostly blended with other pozzolanic materials, together with activators as binders in the cement matrix. In this study, cement was partially substituted using CCR at 0%, 7.5%, 15%, 22.5% and 30% by weight replacement, and nano silica (NS) was utilized as an additive by weight of binder materials at 0%, 1%, 2%, 3% and 4%. The properties considered were the slump, the compressive strength, the flexural strength, the splitting tensile strength, the modulus of elasticity, and the water absorption capacity. The microstructural properties of the concrete were also examined through FESEM and XRD analysis. The results showed that both CCR and NS increase the concrete’s water demand, hence reducing its workability. Mixes containing up to 15% CCR only showed improved mechanical properties. The combination of CCR and NS significantly improved the mechanical properties and decreased the concrete’s water absorption through improved pozzolanic reactivity as verified by the FESEM and XRD results. Furthermore, the microstructure of the concrete was explored, and the pores were refined by the pozzolanic reaction products. The optimum mix combination was obtained by replacing 15% cement using CCR and the addition of 2% NS by weight of cementitious materials. Therefore, using a hybrid of CCR and NS in concrete will result in reduction of cement utilization in concrete, leading to improved environmental sustainability and economy.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Durability Performance of Concrete Containing Calcium Carbide Residue and Nano Silica

et al. 2021

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“…into building material . The CCR–FA‐based cements and mortars not only increase strength and durability, but also improve chloride penetration and other physical, hydraulic, and mechanical properties of clayey soil …”

Section: Sustainable Access Usage and Recycling Of Calcium Carbidementioning

confidence: 99%

“…into building material. [170] The CCR-FA-based cements and mortars not only increases trengtha nd durability, [161c] buta lso improvec hloride penetration [171] and other physical, hydraulic, and mechanical properties of clayey soil. [172] Electrostatic precipitators captured ispelled particles from an incinerator.T he ash collected at the bottom of an incinerator is called bottom ash.…”

Section: Calcium Carbidef or Ahealthyenvironment And Civil Engineeringmentioning

confidence: 99%

Calcium‐Based Sustainable Chemical Technologies for Total Carbon Recycling

2019

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Calcium carbide, a stable solid compound composed of two atoms of carbon and one of calcium, has proven its effectiveness in chemical synthesis, due to the safety and convenience of handling the C≡C acetylenic units. The areas of CaC2 application are very diverse, and the development of calcium‐mediated approaches resolves several important challenges. This Review aims to discuss the laboratory chemistry of calcium carbide, and to go beyond its frontiers to organic synthesis, life sciences, materials and construction, carbon dioxide capturing, alloy manufacturing, and agriculture. The recyclability of calcium carbide and the availability of large‐scale industrial production facilities, as well as the future possibility of fossil‐resource‐independent manufacturing, position this compound as a key chemical platform for sustainable development. Easy regeneration and reuse of the carbide highlight calcium‐based sustainable chemical technologies as promising instruments for total carbon recycling.

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“…These wastes contain a calcium content of more than 60% and require well-managed reuse and disposal. A portion of CCR can be used as supplementary cementing materials for cement and concrete 20 , 21 . However, recycling is limited considering the unsoundness of cement and concrete.…”

Section: Introductionmentioning

confidence: 99%

Calcium wastes as an additive for a low calcium fly ash geopolymer

Chindaprasirt,

Rattanasak

2023

Sci Rep

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A geopolymer is a low-carbon cement based on the utilization of waste ash in alkali-activated conditions. Coal fly ash is widely used as a source material for geopolymer synthesis since it contains a sufficient amount of reactive alumina and silica for geopolymerization. Geopolymer products are known to have beneficial fire resistance and mechanical properties. Class F or low-calcium fly ash (LCFA) is generally used as a primary aluminosilicate source; however, heat curing is required to complete the reaction and hardening process and achieve a strong composite. Furthermore, calcium additives are often required to improve the strength of LCFA geopolymers. This paper presents the potential of reusing calcium waste for this purpose. Three calcium wastes, namely calcium carbide residue (CCR), limestone waste, and waste cement (WC) slurry in powder form were used as additives and compared with the use of ordinary Portland cement (OPC). LCFA was replaced with the calcium additives at 20%. However, 20% CCR resulted in flash setting, hence 5% CCR was used instead. A durability test using 3% HCl solution was also performed. The results showed that the reactivity of calcium additives played an important role in strength development. In the calcium–aluminosilicate–alkali system, calcium silicate hydrate (CSH) and calcium aluminosilicate hydrate (CASH) were formed. The maximum strength of 21.9 MPa was obtained from the OPC/LCFA geopolymer, and 3% HCl solution had a deleterious effect on the strength. OPC and CCR were favorable reactive sources of calcium compounds to blend with LCFA. From the thermogravimetric results, lower thermal weight changes with higher strength gains were achieved. Low CaCO3 decomposition at 750 °C according to the TGA curves indicated the more formation of thermally stable CSH and high compressive strength of Ca/LCFA geopolymers.

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Influence of Activation Methods on Strength and Chloride Resistance of Concrete Using Calcium Carbide Residue–Fly Ash Mixture as a New Binder

Cited by 15 publications

References 24 publications

Mechanical Properties and Durability Performance of Concrete Containing Calcium Carbide Residue and Nano Silica

Mechanical Properties and Durability Performance of Concrete Containing Calcium Carbide Residue and Nano Silica

Calcium‐Based Sustainable Chemical Technologies for Total Carbon Recycling

Calcium wastes as an additive for a low calcium fly ash geopolymer

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