Comparing Strength and Modulus of Elasticity Values for Prisms Constructed with Lightweight and Normal Weight Grout
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 8
Abstract
Current masonry design standards allow for the use of lightweight concrete masonry unit (CMUs), but lightweight grout is not an approved building material. An experimental test program was conducted to compare the compressive strength and modulus of elasticity of masonry prisms constructed with lightweight and normal weight grout. Three strength categories were considered: 13,780, 20,670, and 27,560 kPa (2,000, 3,000, and 4,000 psi). The experimental results indicated that at prism compressive strengths near 13,780 kPa (2,000 psi), there was no statistical strength difference between prisms made with lightweight and normal weight grout. As a result, the authors suggest that for compressive strengths near 13,780 kPa (2,000 psi), lightweight grout should be a code-acceptable alternative to normal weight grout. At higher prism compressive strengths, the values obtained for lightweight and normal weight materials diverged, and the lightweight prisms could not sustain the same loads and stresses as those made with normal weight grout. The results suggest that the difference in strength between lightweight and normal weight prisms can be accounted for by applying a lightweight reduction factor to the data set.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
References
ACI (American Concrete Institute). 2014. Guide for structural lightweight-aggregate concrete. Farmington Hills, MI: ACI.
ACI (American Concrete Institute). 2019. Building code requirements for structural concrete. Farmington Hills, MI: ACI.
ASTM. 2014. Standard test method for sieve analysis of fine and coarse aggregates. West Conshohocken, PA: ASTM.
ASTM. 2015a. Standard test method for density, relative density (specific gravity), and absorption of coarse aggregate. West Conshohocken, PA: ASTM.
ASTM. 2015b. Standard test method for density, relative density (specific gravity), and absorption of fine aggregate. West Conshohocken, PA: ASTM.
ASTM. 2015c. Standard test method for slump of hydraulic-cement concrete. West Conshohocken, PA: ASTM.
ASTM. 2016a. Standard test method for capping concrete masonry units, related units and masonry prisms for compression testing. West Conshohocken, PA: ASTM.
ASTM. 2016b. Standard test method for compressive strength of hydraulic cement mortars (Using 2-in. or [50-mm] cube specimens). West Conshohocken, PA: ASTM.
ASTM. 2016c. Standard test method for compressive strength of masonry prisms. West Conshohocken, PA: ASTM.
ASTM. 2017a. Standard specification for lightweight aggregates for structural concrete. West Conshohocken, PA: ASTM.
ASTM. 2017b. Standard test method for Young’s modulus, tangent modulus, and chord modulus. West Conshohocken, PA: ASTM.
ASTM. 2018a. Standard specification for aggregates for masonry grout. West Conshohocken, PA: ASTM.
ASTM. 2018b. Standard specification for grout for masonry. West Conshohocken, PA: ASTM.
ASTM. 2018c. Standard test method for compressive strength of cylindrical concrete specimens. West Conshohocken, PA: ASTM.
ASTM. 2018d. Standard test method for sampling and testing grout. West Conshohocken, PA: ASTM.
Bane, D. K. 2016. “Material and structural properties of lightweight masonry grout.” Master’s thesis, Dept. of Civil and Environmental Engineering, Tennessee Tech Univ.
Martins, R. O. 2018. Influence of blocks and grout on compressive strength and stiffness of concrete masonry prisms. Washington, DC: Construction and Building Materials.
Petty, P. B., and M. R. Nelson. 2011. “Structural lightweight masonry grout.” In Proc., 11th North American Masonry Conf. Longmont, CO: The Masonry Society.
Sarhat, S. R., and E. G. Sherwood. 2013. “The prediction of compressive strength of grouted hollow concrete block masonry based on the contributions of its individual components.” In Proc., 12th Canadian Masonry Symp. Longmont, CO: The Masonry Society.
Tanner, A., and F. Fonseca. 2014. “Strength of masonry grout made with expanded shale.” Master’s thesis, Dept. of Civil and Environmental Engineering, Brigham Young Univ.
TMS (The Masonry Society). 2016. Building code requirements and specifications for masonry structures. Longmont, CO: TMS.
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© 2023 American Society of Civil Engineers.
History
Received: Jun 4, 2022
Accepted: Nov 21, 2022
Published online: May 16, 2023
Published in print: Aug 1, 2023
Discussion open until: Oct 16, 2023
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