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A platform for research: civil engineering, architecture and urbanism
Synthesis and characterization of bio-cement from conch shell waste
Highlights Bio-cement can be successfully manufactured using conch shell waste as a raw material. The physicochemical properties of bio-cement and its hydration products were similar to that of Type I cement. Compressive strength of the bio-cement made with 100% conch shell was 20 MPa at 7 days. C-S-H gel of conch shell cement had low Ca/Si and high Al/Si ratio.
Abstract This paper demonstrates a laboratory-scale synthesis and analysis of cement using conch shell waste (CS bio-cement) similar in composition to Type I ordinary portland cement (OPC) by replacing calcite raw material with ground processed conch shell waste at varying levels (0–100%). The CS bio-cements were similar to Type I OPC in phase composition, hydration behavior, strength, and microstructure development up to 60% replacement. Higher conch shell substitution (60–100%) tends to incorporate more alumina and alkali in the clinker without compromising other properties significantly. CS bio-cement with above 60% conch shell exceeded the Na2O content limit for Type I OPC or low alkali cement. Nevertheless, those cements will be qualified as high alkali cements for appropriate construction use. The results suggest that CS bio-cement has potential for applications in concrete construction. However, the durability of the concrete containing CS bio-cement should be evaluated prior to real-world applications.
Synthesis and characterization of bio-cement from conch shell waste
Highlights Bio-cement can be successfully manufactured using conch shell waste as a raw material. The physicochemical properties of bio-cement and its hydration products were similar to that of Type I cement. Compressive strength of the bio-cement made with 100% conch shell was 20 MPa at 7 days. C-S-H gel of conch shell cement had low Ca/Si and high Al/Si ratio.
Abstract This paper demonstrates a laboratory-scale synthesis and analysis of cement using conch shell waste (CS bio-cement) similar in composition to Type I ordinary portland cement (OPC) by replacing calcite raw material with ground processed conch shell waste at varying levels (0–100%). The CS bio-cements were similar to Type I OPC in phase composition, hydration behavior, strength, and microstructure development up to 60% replacement. Higher conch shell substitution (60–100%) tends to incorporate more alumina and alkali in the clinker without compromising other properties significantly. CS bio-cement with above 60% conch shell exceeded the Na2O content limit for Type I OPC or low alkali cement. Nevertheless, those cements will be qualified as high alkali cements for appropriate construction use. The results suggest that CS bio-cement has potential for applications in concrete construction. However, the durability of the concrete containing CS bio-cement should be evaluated prior to real-world applications.
Synthesis and characterization of bio-cement from conch shell waste
Chandrasiri, Chathurani (author) / Yehdego, Tesfamichael (author) / Peethamparan, Sulapha (author)
Construction and Building Materials ; 212 ; 775-786
2019-04-05
12 pages
Article (Journal)
Electronic Resource
English
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