Compressive strength and chloride ion permeation resistance of mortar containing clinker with different mineral composition as an aggregate

Compressive strength and chloride ion permeation resistance of mortar containing clinker with different mineral composition as an aggregate

Ishikawara, Kotaro (Tohoku University, Japan)
Miyamoto, Shintaro (Tohoku University, Japan)
Hayashi, Kensuke (Taiheiyo Cement Corpration, Japan)
Minagawa, Hiroshi (Tohoku University, Japan)
Hisada, Makoto (Tohoku University, Japan)

2021-04-29

The purpose of this study is to clarify the performance of cement hardenings containing clinkers which are utilized as aggregate by evaluating the compressive strength and chloride ion penetration resistance of the mortars. Here, the fine aggregate used in this study were the ordinary Portland cement clinker and the clinker with more waste as an alternative raw material. In addition to this, we discussed on the effect of the clinkers on the compressive strength and chloride ion penetration resistance of mortar based on the weight loss on ignition and void structure. The results showed that the compressive strength of the mortars containing clinker aggregate was equal to or more than the mortar used an ISO standard sand, and the apparent diffusion coefficient of chloride ion decreased by using clinker. The reason why improving compressive strength and chloride ion penetration resistance might be attributed to the densification of the voids in the range of 50 nm to 2 μm, which is considered to be the void diameter represented by the interfacial transition zone, by hydration of clinker itself.

chloride ion permeation resistance
cement clinker aggregate
compressive strength

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(c) 2021 the authors