Abstract
This paper presents an experimental investigation on the compressive strength and stress-strain curves of concrete block masonry with varying block and grout strengths and reinforcement ratio. The three-block prisms, built with 8.5 and 15.0 MPa blocks, were tested hollow and filled with 17.0 and 30.0 MPa compressive strength grouts. In addition, prisms and walls with reinforcement rates of 0.15%, 0.40% and 1.0 % were also tested. With the results, it was possible to measure the compressive strength and stress-strain behavior of masonry with inclusion of different grout and reinforcement components, giving parameters for better evaluation of their performance and design. Among the conclusions, it was observed that increasing the compressive strength of masonry is not proportional to the increase of the grouting area and the efficiency of reinforcement to increase compressive strength is low. Stress-strain curves for the several materials combinations are made available.
Highlights
Everyday, the construction of high structural masonry buildings, with greater spans and higher load, becomes more frequent
This paper presents an experimental investigation on the compressive strength and stress-strain curves of concrete block masonry with varying block and grout strengths and reinforcement ratio
The main objective of this paper is to present a study on the behavior of concrete hollow block masonry with variable grout and rebar use
Summary
The construction of high structural masonry buildings, with greater spans and higher load, becomes more frequent. The compatibility of all components involved in the production of masonry (block, mortar, grout and rebar) is paramount and essential to maximize and optimize their performance, taking advantage of all the system’s potential This compatibility is only possible with knowledge of the material characteristics and the physical and mechanical phenomena developed in the masonry under service and ultimate loadings [2]. The 1989 version of the Brazilian standard for structural concrete blocks masonry design [7], allowed a small increase in the masonry compressive strength with the rebar presence. The main objective of this paper is to present a study on the behavior of concrete hollow block masonry with variable grout and rebar use. Parameters are measured to assess the increase of structural masonry resistance in the presence of grout and rebar, as well as the behavior of materials at rupture, providing information to aid in the understanding of this composite material behavior and to better calibrate design models in the ultimate limit state
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