Abstract
Considering the advantages of energy conservation and reducing the construction skill requirement of the workers, a new type of interlocking hollow block using recycled aggregates concrete (IHB-RAC) with the compressive strength up to 10 Mpa was proposed, which could help improve more than 56% of the construction efficiency compared to commonly used concrete hollow blocks. In order to study the mechanical properties and promote the application of this new type block in building engineering, the masonries considering different strengths of mortar and the concrete used in the grouting holes were designed, and the corresponding compressive and shear strength, as well as the failure mode of the masonries were studied according to the test results. Then, experimental results were compared with the calculated values obtained from Chinese code GB50003-2011 to check the suitability of the standards. In order to make an accurate prediction of the compressive strength of the masonry, modifying coefficients were suggested considering the positive contributions of the connecting keys. In addition, according to the test results, an appropriate calculation method for accurately predicting the shear strength of the grouted IHB-RAC masonry was proposed by separately considering the effort of the mortar and the grouting hole concrete.
Highlights
Nowadays, environmental pollution and energy waste have elicited increasing attention [1,2,3]
Considering the advantages of interlocking hollow blocks and the utilization of recycled aggregate, a new type of interlocking hollow block using recycled aggregate concrete (IHB-RAC) was proposed in this study, and the corresponding compressive and shear strength, as well as the failure mode of the masonries considering different strength of mortar and the concrete used in the grouting holes were studied by experiments
The calculation methods of predicting the compressive and shear strength of the masonries were proposed for engineering application according to test results
Summary
Environmental pollution and energy waste have elicited increasing attention [1,2,3]. Sintered clay blocks have played a very important role in improving our living environment, many disadvantages followed with that as the destruction of arable land as well as the excessive consumption of energy and resources have had a great adverse effect on the environment [4]. With the promotion of low-carbon life and the application of green buildings, the research on the hollow concrete block has become a hot topic, which could avoid using clay and play a constructive role in building insulation as there are cavities inside the blocks [5,6]. To improve the construction efficiency as well as reduce the cost of construction material, new types of hollow blocks called interlocking blocks were suggested and used [12].
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