In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Chat with Us Online Now
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Improvement in Water Resistance of Polymer-Modified Gypsum-Based Composites
Author(s): Y. Ohama, K. Demura, S. Kumagai, M. Joo, T. Katsuhata,
D. Sugawara, and D. W. Fowler
Publication: Special Publication
Appears on pages(s): 659-672
Keywords: blast-furnace slag; cement (ordinary Portland); curing; gypsum; silica
fume; strength (compressive); strength (flexural)
Abstract:Gypsum is widely used for the manufacture of various building materials because of its advantages such as rapid setting, good thermal insulating property and fire resistance, but their use is limited to interior finishings because of its poor water resistance. This paper deals with an improvement in the water resistance of gypsum composite by the polymer modification and partial replacement of sum with ground granulated blast-furnace slag (Blaine fineness=1 0,000 cm /g , silica fume and ordinary portland cement. Polymer-modified gypsum-based composites are prepared with various polymer-binder (a mixture of gypsum and mineral admixtures) ratios, and tested for water absorption, flexural and compressive strengths before and after water immersion. The water resistance of the gypsum composite is markedly improved by the polymer modification and partial replacement of gypsum with ground granulated blast-furnace slag, silica fume and ordinary portland cement. In addition, the effects of curing conditions on the strength properties of the polymer-modified gypsum-based composites are investigated. As a result, an SBK-modified gypsum-based composite with an optimum mix proportion is proposed from the viewpoints of water resistance, strength development and hair crack disappearance.
Click here to become an online Journal subscriber