Research On Mechanical Properties Of Self-insulation Grouted Mortarless Concrete Block Reinforced Masonry

In order to make the wall heat preservation and heat insulation be achieved, in combination with reinforced block masonry and the advantage of no mortar masonry,self-insulation grouted mortarless concrete block reinforced masonry on the mechanical properties and thermal properties were studied in this thesis.In order to study the compression performance of self-insulation grouted mortarless concrete block reinforced masonry, three groups of 9 self-insulation grouted mortarless concrete block reinforced masonry specimens. Three contrast specimens are four groups of 12 self-insulation grouted concrete block reinforced masonry specimens, three groups of 9 grouted mortarless concrete block reinforced masonry specimens, and nine groups of 27 grouted concrete block reinforced masonry specimens were studied. Compressive mechanical properties, cracking strength,breaking strength, and constitutive relation of self-insulation grouted mortarless concrete block reinforced masonry were studied. According to the experimental data regression, stress-strain curves and elastic modulus were obtained. Because of the addition of thermal insulation layer, two kinds of calculation and analysis models of compressive strength for self-insulation grouted mortarless concrete block reinforced masonry were put forward in the thesis. One is not considered mechanical effect of the insulation layer, which is considered as normal masonry. The other is to treat the whole cross section of the block as a bearing surface, which is more similar with the measures results. It shows that the compressive strength of masonry meet regulatory requirements.In order to study the shear performance of self-insulation grouted mortarless concrete block reinforced masonry, three groups of 18 self-insulation grouted mortarless concrete block reinforced masonry specimens. Three contrast specimens are two groups of 12 self-insulation grouted concrete block reinforced masonry specimens, three groups of 18 grouted mortarless concrete block reinforced masonry specimens, and eigth groups of 48 grouted concrete block reinforced masonry specimens were studied. Shear cracking strength, ultimate strength and ultimate destruction of failure modes of self-insulation grouted mortarless concrete block reinforced masonry were studied. It shows that the shear strength of masonry meet regulatory requirements. Shear strength calculation model, and the correspondingshear strength formula were put forward.Using finite element software ABAQUS simulation analysis of self-insulation grouted mortarless concrete block reinforced masonry. Establish discrete and integral model were set up to analyze self-insulation grouted mortarless concrete block reinforced masonry. The finite element analysis results are close to both the experimental and specification values. Finite element stress nephogram reflects the actual damage morphology, which was based on the strength calculation formula and deformation performance analysis of formula of self-insulation grouted mortarless concrete block reinforced masonry.In this thesis, three different kinds of the energy-saving wall insulation without mortar theory of heat transfer coefficient and thermal inertia index were calculated.Through the thermal performance test analysis on the wall, it showed that the heat preservation mortar block masonry of energy-saving wall thermal performance meet the national standard regulations limit, which has good heat insulation performance.The results in this thesis have the ability to provide a reference for the research and design of self-insulation grouted mortarless concrete block reinforced masonry.