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Concrete Admixtures

John Huang, Ph.D., PE and John Poullain, PE

This two-hour online course discusses commonly used chemical admixtures for concrete and describes their basic uses. Concrete can usually be made with the desirable qualities of being workable, durable and strong by using suitable materials without admixtures. Admixtures however are used to improve the quality of concrete during mixing, transporting, placement, curing and to achieve certain properties. The course text can serve as a reference. The admixtures discussed include air entraining, water reducing, set retarding, and specialty admixtures. This course should benefit civil engineers, pavement engineers, transportation engineers, field and office personnel, supervisors and maintenance personnel. It includes a multiple-choice quiz (15 questions) at the end, which is designed to enhance the understanding of the course materials. Admixtures have long been used to improve the performance of concrete. Earlier materials used included organic matter such as milk and lard by the Romans and rice paste and blackstrap molasses by the Chinese. Concrete properties may be modified to increase compressive and flexural strength, to improve durability, inhibit corrosion, reduce shrinkage, and accelerate or retard initial set among the many uses. Desirable qualities of concrete, workability, finishability, and wear resistance can often be achieved by using suitable materials. However to achieve certain properties, and maintain quality during mixing, curing in adverse conditions or emergencies, admixtures become necessary.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.