ACI 308.1 PDF

ACI Specification for Curing Concrete. Published By: American Concrete Institute (ACI); Page Count: 11; ANSI Approved: No; DoD Adopted: No. Find the most up-to-date version of ACI at Engineering Buy ACI SPECIFICATION FOR CURING CONCRETE from SAI Global.

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Specification for Curing Concrete

July 30, – 2: The appropriate duration of curing will depend on the property that is the slowest to develop. The full and complete returned product will be accepted if returned within 60 days of receipt and in salable condition.

Concrete Cracking October 30, – The objective of curing is to allow the concrete to meet performance parameters; SCP products produce those performance parameters at a rate equal to or better than moist curing.

The action works in the other direction as well, holding in water that would normally evaporate at early ages. This document provides requirements for alternative methods for curing concrete.

Figure 2 shows the performance of concrete treated with SCP products versus air and moist cured concrete. These items are not eligible for return. Concrete — Drying vs. At least two ASTM C09 subcommittees are currently working on standards to better evaluate the performance of colloidal silica. These alternative methods are not necessarily equal in effectiveness, cost, effect on project schedule, or impact on other aspects of the project.

Figure 3 below shows the performance of treated concrete tested for drying shrinkage, another important reason curing is required, demonstrating improvements over moist-cured control samples.

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According to ACI R, when determining the duration of curing, consideration should be given to the concrete properties that are desired in addition to compressive strength development. Errata are not included for collections or sets of documents such as the ACI Collection. The materials, processes, quality control measures, and inspections described in this document should be tested, monitored, or performed as applicable only by individuals holding the appropriate ACI certifications or equivalent.

An important consideration when evaluating products for use with concrete is that ASTM develops standards to generate performance numbers while ACI writes the guides and specifications that are used to put the numbers generated into practice. Figure 1 above shows the percentage of strength gain associated with various curing methods. Compressive Strength as a Function of Age for a Variety of Curing Conditions ACI R According to ACI R, when determining the duration of curing, consideration should be given to the concrete properties that are desired in addition to compressive strength development.

308.1-11 Specification for Curing Concrete

Because SCP products penetrate into the concrete, they do not form a surface membrane. In other words, the semi-evaporable and non-evaporable water continues to be made available for hydration until it is consumed or an equilibrium state is achieved when SCP products are used.

This specification has default settings that may or may not be applicable to a specific project. Any applicable errata are included with individual documents at the time of purchase.

Figure 4 shows the performance of treated concrete in water permeability testing in ai hydrostatic pressure environment, another reason curing is often called out. February 26, – 1: This action makes SCP products an effective waterproofing agent, even under hydrostatic pressure.

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Compressive strength development is the primary reason curing of concrete is required, and SCP products help achieve even better performance that moist-cured concrete, long held as the gold standard of curing concrete. ASTM C membrane-forming curing compounds were developed as a solution to the need for a time-saving alternative to water ponding. The reaction products formed fill capillaries and shut down liquid water transmission. This specification addresses curing methods applied after placement of concrete and does not apply to internal curing use of saturated lightweight aggregate or other materials to provide supplemental water or to accelerated curing heat curing.

Additionally, SCP products become a permanent part of the concrete while membranes and water ponding are temporary.

While membranes degrade over time, and water ponding methods cannot be continued indefinitely, the use of SCP products provides a continuous curing environment. Guide for Specifying Underground Shotcrete. Choose Product Language English. Curing August 27, – 4: Until those standards are available, and ACI For a listing of and access to all product errata, visit the Errata page.