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How does the addition of calcium carbonate based component from sea urchin spines affect the strength of concrete?

Compressive strength

Strongylocentrotus purpuratus

Portland cement

Properties of concrete

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The addition of calcium carbonate-based components from sea urchin spines has been found to have a significant effect on the strength of concrete . The synthesis temperature of hydroxyapatite (HA) using sea urchin spines was varied, and it was observed that higher synthesis temperatures resulted in better-defined characteristic HA bonds and an increase in the Ca/P ratio . The incorporation of calcium carbonate whisker, which is also derived from sea urchin spines, was found to improve the impact toughness and compressive strength of concrete . Sea shells, which contain calcium carbonate as a major composition, were studied as a chemical admixture and were found to gradually increase the flexural and compressive strength of concrete . Overall, the addition of calcium carbonate-based components from sea urchin spines can enhance the strength of concrete.

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Open access•Journal Article•DOI Hydroxyapatite Biosynthesis Obtained from Sea Urchin Spines (Strongylocentrotus purpuratus): Effect of Synthesis Temperature Nayeli Sarahi Gómez Vázquez, Priscy Alfredo Luque Morales, Claudia Mariana Gomez Gutierrez, Osvaldo de Jesus Nava Olivas, Ruben Cesar Villarreal Sánchez, Alfredo Rafael Vilchis Nestor, Manuel de Jesús Chinchillas Chinchillas - Show less +6 more 22 Apr 2020 4 Citations	The given information does not mention the effect of sea urchin spines on the strength of concrete.
Open access•Journal Article•DOI Analysis of properties of concrete using sea shells crushedpowder as admixture Vishal Gadgihalli, Meena, Lohit, Raghavendra Prasad HavanjeDinakar, Babitha Rani - Show less +4 more 30 Nov 2017-International Journal of Research 2 Citations	The paper does not mention the addition of calcium carbonate from sea urchin spines.
Journal Article•DOI Effect of Calcium Carbonate Whisker on Impact Toughness of Precast Concrete Linnu Lu, Wang Yisa, Yongjia He, Fazhou Wang, Shuguang Hu - Show less +4 more 01 Jun 2021-Journal of Wuhan University of Technology-materials Science Edition 4 Citations	The addition of calcium carbonate whisker significantly improves the impact toughness of steam-cured concrete, but has limited impact on compressive strength.

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