Influence of Chemical Admixtures and Mixing Methods on the Air Void Systems in Portland Cement Mortars

Torrans, Patrick H.; Ivey, Don L.

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Influence of Chemical Admixtures and Mixing Methods on the Air Void Systems in Portland Cement Mortars

1968-02-01
By Torrans, Patrick H. ; Ivey, Don L.

File Language:

English

Details

Creators:

Torrans, Patrick H. ; Ivey, Don L.
Corporate Creators:

Texas Transportation Institute. Texas A&M University
Corporate Contributors:

Texas Highway Department ; United States. Department of Transportation. Federal Highway Administration. Bureau of Public Roads
Subject/TRT Terms:
Publication/ Report Number:

103-2
Resource Type:

Tech Report
Geographical Coverage:

Texas ; United States
Corporate Publisher:

Texas Transportation Institute. Texas A&M University
Abstract:

Variations in the entrained air system in hydraulic cement mortars due to different chemical types of air-entraining agents and retarders and different mixing methods were investigated. Twenty-seven mortar hatches were prepared at a fundamentally constant air content using different combinations of three mixing sequences, three air-entraining agents, and three retarders. The Powers and Philleo spacing factors were determined on specimens from each hatch and were used as the criteria for comparison of the air void systems. Observed differences in the Powers spacing factor were found to be statistically significant for different mixing methods and different air-entraining agents. Comparatively large values of the Powers spacing factor were observed when the air-entraining agent and retarder were combined in the same water phase before being combined with the cement and sand. Relatively low values of Powers' spacing factor were observed when the organic acid retarder was used, regardless of the air-entraining agent used.
Format:

PDF
Funding:

2-5-66-103
Download URL:

https://rosap.ntl.bts.gov/view/dot/84528/dot_84528_DS1.pdf
File Type:

[PDF - 1.21 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:e6741ec9668a43837bf481629694062613a112b83fd85acc4b1d2f19bfa52010e30cab789eb607f8d0df1413719e62287dadd5776f275550a8960d2fa3f44f2e

File Language:

English

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