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2002•Journal of Building MaterialsRequires access

Effect of the Silica Fume on the Early Shrinkage of Hardened Cement Paste

Shen Yang

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Abstract

In 20 ℃ sealed situation, shrinkage of hardened cement paste(HPC) increases in the first few days and becomes steady after 5 d. It shows 0.125% early shrinkage at 29 d hydration. The early shrinkage is markedly increased when silica fume is in HPC. It is up to 0.238% at 29 d hydration when silica fume replaces 10% of cement in HPC. The relationship between HPC's early shrinkage and content of silica fume is studied and a hypothesis is proposed.

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What this paper is about

In 20 ℃ sealed situation, shrinkage of hardened cement paste(HPC) increases in the first few days and becomes steady after 5 d. It shows 0.125% early shrinkage at 29 d hydration. The early shrinkage is markedly increased when silica fume is in HPC. It is up to 0.238% at 29 d hydration when silica fume replaces 10% of cement in HPC. The relationship between HPC's early shrinkage and content of silica fume is studied and a hypothesis is proposed.

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Available abstract

In 20 ℃ sealed situation, shrinkage of hardened cement paste(HPC) increases in the first few days and becomes steady after 5 d. It shows 0.125% early shrinkage at 29 d hydration. The early shrinkage is markedly increased when silica fume is in HPC. It is up to 0.238% at 29 d hydration when silica fume replaces 10% of cement in HPC. The relationship between HPC's early shrinkage and content of silica fume is studied and a hypothesis is proposed.

Key concepts: Shrinkage, Silica fume, Materials science, Cement, Composite material

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