Comparing Strength and Modulus of Elasticity Values for Prisms Constructed with Lightweight and Normal Weight Grout

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Comparing Strength and Modulus of Elasticity Values for Prisms Constructed with Lightweight and Normal Weight Grout

Grout is a high-slump cementitious material frequently used in masonry construction. The primary use of masonry grout is to fill the voids of the concrete masonry units and bind the reinforcement to the structure. However, masonry grout contributes significantly to the overall structural mass; proportionally increasing the applied loads in a seismic event. The motivation of this research focuses on reducing structural mass, therefore decreasing seismic forces, by utilizing lightweight grout. The use of lightweight materials has seen an increase due to the success of lightweight concrete. The Building Code Requirements for Structural Concrete (ACI 318) allows the use of lightweight concrete as long as the prescribed reduction factor is applied to the design. Masonry construction has two main components: concrete masonry units and masonry grout. The Building Code Requirements for Masonry Structures (TMS 402) allows the use of light masonry units but, at the time of this research, lightweight grout is not an acceptable building material. Similar to ACI 318, TMS 402 could apply a reduction factor so that lightweight grout can be utilized. Previous research has focused on the individual components of a masonry structure such as mortar, masonry units, and grout. However, the purpose of this research is to quantitatively compare the compressive strengths and modulus of elasticity for lightweight grout with that of normal weight grout in masonry prisms. The results of the data show a trend that at lower normal weight prism compressive strengths, there is no statistical difference in the use of lightweight grout and normal weight grout. However, as normal weight prism strength increases, the differences between the normal weight and lightweight aggregates can be seen as the lightweight prisms are not as strong as their normal weight counterpart.

title: Comparing Strength and Modulus of Elasticity Values for Prisms Constructed with Lightweight and Normal Weight Grout

creator: Daniel Rikli

subject: Civil engineering [0543] - primary

description: Grout is a high-slump cementitious material frequently used in masonry construction. The primary use of masonry grout is to fill the voids of the concrete masonry units and bind the reinforcement to the structure. However, masonry grout contributes significantly to the overall structural mass; proportionally increasing the applied loads in a seismic event. The motivation of this research focuses on reducing structural mass, therefore decreasing seismic forces, by utilizing lightweight grout. The use of lightweight materials has seen an increase due to the success of lightweight concrete. The Building Code Requirements for Structural Concrete (ACI 318) allows the use of lightweight concrete as long as the prescribed reduction factor is applied to the design. Masonry construction has two main components: concrete masonry units and masonry grout. The Building Code Requirements for Masonry Structures (TMS 402) allows the use of light masonry units but, at the time of this research, lightweight grout is not an acceptable building material. Similar to ACI 318, TMS 402 could apply a reduction factor so that lightweight grout can be utilized. Previous research has focused on the individual components of a masonry structure such as mortar, masonry units, and grout. However, the purpose of this research is to quantitatively compare the compressive strengths and modulus of elasticity for lightweight grout with that of normal weight grout in masonry prisms. The results of the data show a trend that at lower normal weight prism compressive strengths, there is no statistical difference in the use of lightweight grout and normal weight grout. However, as normal weight prism strength increases, the differences between the normal weight and lightweight aggregates can be seen as the lightweight prisms are not as strong as their normal weight counterpart.

contributor: Tennessee Technological University

date: 2020-11-20

type: text

publisher: Tennessee Technological University. Archives and Special Collections

language: English

rights: In Copyright

access Rights: This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

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