Influence of pre-wetting, non-shrink grout, and scaling on the compressive strength of grouted concrete masonry prisms

AbdelRahman, Belal

doi:10.1016/j.conbuildmat.2019.117985

Cited by 23 publications

(1 citation statement)

References 4 publications

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“…Moreover, Fonseca et al [14] stated that for grouted concrete masonry, highstrength blocks (>40 MPa) were not efficient for improving the compressive strengths, as the grouted masonry prisms made of medium-strength blocks (>25 MPa) also showed similar strengths. Rahman and Galal [15], tested the influence of pre-wetting of blocks and usage of nonshrink grout to the compressive strength of grouted masonry. Their results showed that grouting of wet prisms exhibited a significant increase in the compressive strength of grouted masonry.…”

Section: Introductionmentioning

confidence: 99%

Reliable unit strength correlations to predict the compressive strength of grouted concrete masonry

Thamboo,

Sathurshan,

Zahra

2024

Preprint

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Compressive strength of grouted concrete masonry is an important parameter to design reinforced/grouted concrete masonry walls. The design standards stipulate two methods to determine the compressive strength of masonry (1) using tabulated unit strength and mortar type, and (2) testing representative masonry prisms. The compressive strength prediction of grouted concrete masonry is influenced by compressive strength characteristics of hollow blocks, mortar and grout used. Due to insufficient test data, research in this area is limited. Therefore, a multi-level approach was employed in this study to improve the existing unit strength correlations of the standards for more accurate prediction of compressive strengths of grouted concrete masonry. Initially, the existing methods to determine the compressive strength of grouted masonry were critically appraised and a database of compression tests of grouted concrete masonry prisms/wallettes was developed. This database was then used to evaluate the correlations between the compressive strengths of block, mortar, grout and masonry. The applicability of existing unit strength correlations from the design standards and literature were assessed and their relevancy and limitations are highlighted. Subsequently, updated sets of unit strength correlations are proposed in this study, through statistical reliability analyses of the predictions against the experimental results included in the database. The proposed unit strength correlations were classified according to the mortar type/strengths (≤ 10 MPa and > 10 MPa). It has been shown that the new correlations are more reliable than the existing unit strength correlations through comparing the 95th percentile error values.

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Section: Introductionmentioning

confidence: 99%