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.
|Published (Last):||11 December 2016|
|PDF File Size:||14.80 Mb|
|ePub File Size:||15.19 Mb|
|Price:||Free* [*Free Regsitration Required]|
The reaction products formed fill capillaries and shut down liquid water transmission. This action makes SCP products an effective waterproofing agent, even under hydrostatic pressure. The action works in the other direction as well, holding in water that would normally evaporate at early ages.
Because SCP products penetrate into the concrete, they do not form a surface membrane. 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.
ACI 308.1-11 Specifications for Curing Concrete
acci At least two ASTM C09 subcommittees are currently working on standards to better evaluate the performance of colloidal silica. Until those standards are available, and ACI 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.
The appropriate duration of curing will depend on the property that is the slowest to develop. 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.
While membranes degrade over time, and water ponding methods cannot be continued indefinitely, the use of SCP products provides a continuous curing environment.
Figure 1 above shows the percentage of strength gain associated with various curing methods. Figure 2 shows the performance of concrete treated with SCP products versus air and moist cured concrete.
Specification for Curing Concrete
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. 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. Figure 4 shows the performance of treated concrete in water permeability testing in a hydrostatic pressure environment, another reason curing is often called out.
ASTM C membrane-forming curing compounds were developed as a solution to the need for a time-saving alternative to water ponding. Additionally, SCP products become a permanent part of the concrete while membranes and water ponding are temporary.
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.
Compressive Strength as a 30.1 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. Concrete Cracking October 30, – February 26, – 1: July 30, – 2: Concrete — Drying vs. Curing August 27, – 4: