Study on durability analysis method of concrete mixed with nanometre calcium carbonate in acid environment Online publication date: Mon, 15-Apr-2024
by Yangyang Xu; Qing Dai; Lulu Miao
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 17, No. 2/3, 2024
Abstract: For the analysis in the acidic environment, the influence of different dosage of nanometre calcium carbonate on concrete durability, firstly, nano calcium carbonate concrete with different dosages was prepared using P·O42.5 cement, coarse and fine aggregates, and nano calcium carbonate as materials. Secondly, according to the ratio of 4,000 mL water, 5.6 mL SO42- solution and 3.2 g hydrooxidation, sulphate solution was prepared as an acidic erosion environment. Then, under the action of acid erosion, the durability of nanometre calcium carbonate concrete was analysed from five aspects: compressive strength, chloride ion penetration resistance, mass loss rate, erosion depth and dynamic elastic modulus. It is found that the durability of concrete specimens is the best when the dosage of nanometre calcium carbonate is 1.0%, and the durability of concrete specimens can be affected if the dosage is less or too much.
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