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Influence of aggregate size and aggregate size grading on ASR expansion

Zhang, Chengzhi / Wang, A. / Tang, Mingshu / Wu, Bingqin / Zhang, Ningsheng

The influences of aggregate size and aggregate size grading on ASR expansion in the Chinese autoclave test were studied. The result shows that the effect of the addition of coarse aggregate on the expansion of mortar is complex. It may be inhibiting expansion, may have no effect, or may be promoting expansion. Moreover, its effect will change with age. By theoretic analysis of micromechanics, it is shown that the effect of coarse aggregate on the expansion of mortar depends on the relation between the free expansion of coarse aggregate epsilon_a and mortar epsilon_s. From the results of experimental and theoretic analyses, the authors suggest that for the evaluation of the alkali-reactivity of aggregate, single-size aggregate grading might be more reasonable.

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Influence of aggregate size and aggregate size grading on ASR expansion

Zhang, Chengzhi / Wang, A. / Tang, Mingshu / Wu, Bingqin / Zhang, Ningsheng

The influences of aggregate size and aggregate size grading on ASR expansion in the Chinese autoclave test were studied. The result shows that the effect of the addition of coarse aggregate on the expansion of mortar is complex. It may be inhibiting expansion, may have no effect, or may be promoting expansion. Moreover, its effect will change with age. By theoretic analysis of micromechanics, it is shown that the effect of coarse aggregate on the expansion of mortar depends on the relation between the free expansion of coarse aggregate epsilon_a and mortar epsilon_s. From the results of experimental and theoretic analyses, the authors suggest that for the evaluation of the alkali-reactivity of aggregate, single-size aggregate grading might be more reasonable.

Influence of aggregate size and aggregate size grading on ASR expansion

Zhang, Chengzhi / Wang, A. / Tang, Mingshu / Wu, Bingqin / Zhang, Ningsheng

The influences of aggregate size and aggregate size grading on ASR expansion in the Chinese autoclave test were studied. The result shows that the effect of the addition of coarse aggregate on the expansion of mortar is complex. It may be inhibiting expansion, may have no effect, or may be promoting expansion. Moreover, its effect will change with age. By theoretic analysis of micromechanics, it is shown that the effect of coarse aggregate on the expansion of mortar depends on the relation between the free expansion of coarse aggregate epsilon_a and mortar epsilon_s. From the results of experimental and theoretic analyses, the authors suggest that for the evaluation of the alkali-reactivity of aggregate, single-size aggregate grading might be more reasonable.

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Title:

Influence of aggregate size and aggregate size grading on ASR expansion

Contributors:

Zhang, Chengzhi (author) / Wang, A. (author) / Tang, Mingshu (author) / Wu, Bingqin (author) / Zhang, Ningsheng (author)

Published in:

Cement and Concrete Research ; 29 ; 1393-1396

Publication date:

1999

Size:

4 Seiten, 5 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0008-8846(99)00099-X

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Mörtel , Autoklav , Verbundwerkstoff , chemische Reaktion , Korngröße , Zuschlagstoff , Reaktivität (Reaktionsfähigkeit)

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