Effects of Aggregate Gradation on Properties of Masonry Cement and Portland Cement-Lime Masonry Mortars PDF Download
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Author: CE. Buchanan
Publisher:
ISBN:
Category : Aggregate
Languages : en
Pages : 18
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Book Description
Eight laboratories participated in a round robin to evaluate variations in aggregate gradation when tested using Masonry cement and Portland cement-lime masonry mortars. A control gradation was used which,was near the center of C144 gradation limits and five other gradations were used which tested the limits of C144. It appears from the data that the limits on C144 can be broadened without appreciably altering the safety built in for user protection. Although not part of the original test program, a study was made of the yield of the various mortars produced, and it was determined that the masonry cements had on average a 5.3% increase in volume over the Portland cement-lime mixes.
Author: CE. Buchanan
Publisher:
ISBN:
Category : Aggregate
Languages : en
Pages : 18
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Book Description
Eight laboratories participated in a round robin to evaluate variations in aggregate gradation when tested using Masonry cement and Portland cement-lime masonry mortars. A control gradation was used which,was near the center of C144 gradation limits and five other gradations were used which tested the limits of C144. It appears from the data that the limits on C144 can be broadened without appreciably altering the safety built in for user protection. Although not part of the original test program, a study was made of the yield of the various mortars produced, and it was determined that the masonry cements had on average a 5.3% increase in volume over the Portland cement-lime mixes.
Author: John H. Matthys
Publisher: ASTM International
ISBN: 0803114532
Category : Concrete masonry
Languages : en
Pages : 440
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Book Description
Author: Margaret Thomson
Publisher:
ISBN:
Category : Air content
Languages : en
Pages : 20
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Book Description
In order to study the effects of finely ground aggregates on the various properties of portland cement-lime (PCL), mortars a research study was conducted. The purpose of this project was to evaluate the effects these materials had on the plastic and hardened properties of (PCL) mortars. Tests conducted on cement-lime mortars suggest that inclusion of finely ground aggregates mixed with the lime used in PCL mortars, produced some beneficial and no detrimental effects on the mortar properties. The air content of the mortars remained approximately the same over the range of replacement types and percentages evaluated, and the water retention values increased with increased percentages of finely ground aggregate materials. Furthermore, while the compressive strength of the mortars showed a slight decrease with increased fine materials at 7 days the compression strength at 28 days increased slightly. In addition, the flexural bond strength of the mortar showed a trend in increased flexural strength with additions of fine aggregate materials, although the high variation in the results showed a very low correlation factor.
Author: Delmar L. Bloem
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 25
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Book Description
Author: Cyrus Charles Fishburn
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 56
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Book Description
The physical properties of mortars, the bond strength of the mortars to masonry units, and the structural strength of concrete masonry and composite masonry walls containing the mortars are discussed and compared. All of the mortars were tempered to as wet a consistency as could be conveniently handled by the mason. The compressive strength of the walls increased, in general, with the compressive strength of the mortar. The racking and flexural strengths of the walls increased with the bond strength of the mortar. The strength of bond test specimens tended to increase with the compressive strength of the wet consistency mortars that were used. However, bond strength appeared to be the dominant factor affecting the racking and flexural strength of the walls. Increase in both bond strength and wall strength with compressive strength of the mortar was not proportional to the relative compressive strengths of the type N and type S mortars. The stiffness of walls subjected to compressive and flexural loads increased with the bond and compressive strength of the mortars. However, the stiffness of walls subjected to flexural loads appeared to be more dependent upon the number of bed joints in the tensile face and on their extension in bond than upon the bending strains in the masonry materials.
Author: DL. Bloem
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 26
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Book Description
Cooperative investigations by several laboratories have been made on behalf of Subcommittee IV on Specifications for Aggregates for Mortar of ASTM Committee C-12 on Mortars for Unit Masonry in an effort to improve grading limitations in ASTM Specifications for Aggregate for Masonry Mortar (C 144). This paper summarizes the results of those researches.
Author: Steven M. Cramer
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 56
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Author: Warren Huber Coate
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
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Author: W. Sriboonlue
Publisher:
ISBN:
Category : Compressive strength
Languages : en
Pages : 9
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Book Description
The results of an experimental program designed to evaluate the influence of constituent proportions on the stress-strain relationship of Portland cement-lime mortar and grout are reported. Grout specimens consisting of 76 millimeter by 152 millimeter cylinders and mortar specimens of 50 millimeter cubes were cast and tested. Mix variations included lime and sand content. Modulus of elasticity of both mortar and grout specimens using different parts of lime and sand are presented. In addition, the relationship of the ultimate compressive strength and modulus of elasticity for various mixes is presented. Mortar cube specimens were constructed following ASTM C270, Standard Specification for Mortar for Unit Masonry. The water content used in mortar was measured as different percentages of flow of fresh mortar. Grout specimens were made in accordance with the ASTM C476, Standard Specification for Grout for Masonry. The water content was measured as different slumps of the grout. The specimens were tested at age twenty-eight days. The results define trends, resulting from varying the constituents, in the stiffness characteristics of mortar and grout.
Author: Amde M. Amde
Publisher: Destech Publications
ISBN:
Category : Concrete
Languages : en
Pages : 816
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Book Description
