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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.
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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: Development of New Ultra-High-Early-
Strength Superplasticizer and Its Application
Author(s): Q. Ran, J. Liu, C. Miao, Y. Mao, Y. Shang, and J. Sha
Publication: Special Publication
Appears on pages(s): 187-200
Keywords: early strength development; industrial application; low temperature; polycarboxylate superplasticizer; precast concrete.
Abstract:A new class of polycarboxylate superplasticizer with a grafted pendant group of polyethylene oxide has been developed and extensively used in the
construction field due to its outstanding water reducing ratio, high workability
retention at small dosages and excellent compatibly with higher dosage rates
of industrial by-products. Nevertheless, a drawback of this new generation
superplasticizer is their effects in delaying the rate of cement hydration, especially when they are used at higher dosages and in low temperatures environment. These aspects limit their industrial application because of the slow mechanical strength development at the early age. In order to overcome this drawback, a new polycarboxylate superplaticizer (SSP) has been developed by means of optimizing the comb copolymer structure so as to meet ultra-early strength development requirements of construction projects. The results of mortar or concrete tests clearly indicate that SSP has the capacity to considerably accelerate the development of early age mechanical strength in conditions of low curing temperature, in comparison with the ordinary superplasticizers. The compressive strength of concrete containing SSP can reach 500% and 480% at an early age of 24 hours and 30 hours, respectively,
when compared with ordinary polycarboxylate polymers at the same dosages.
Engineering experimental results proved that the SSP can meet the requirements of concrete admixtures for high-speed railway construction projects.
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