BEHAVIOR OF DIFFERENT FOOTING SHAPES ON SANDY LAYER IMPROVED WITH CEMENT UNDERLAIN BY WEAK CLAY SOIL AUTHOR(S): SAMIR IBR
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND MECHANICAL ENGINEERING
Author(s): SAMIR IBRAHIM SHALABY
Abstract: One of the most important problems are to construct on soft clay soil. The utilization of a cemented top layer increases bearing capacity, reduces displacement at failure, and change soil behavior to a brittle behavior. The objective of this research paper is directed towards investigating experimentally the effect of footing shapes on the bearing capacity and settlement of weak clay soil overlain by cemented or uncemented sandy soil. Two percent of cement are used as reinforcement for sandy soils. A laboratory experimental work program was carried out on circular, rectangular, and square model footings. The studied parameters include footing shape, thickness of replacement sand layer, and percent of added cement. Experimental results show that the shape of the footing has a pronounced improving effect on soil bearing capacity and its settlement. Circular footing gives the highest improvement while rectangular footing gives the least one. The critical depth of cementing upper sand laye
- Publication Date: 29-Dec-2015
- DOI: 10.15224/978-1-63248-083-5-19
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THE ROLE OF ORGANOSILICON POLYMERS IN THE FORMATION OF HYDROPHOBIC PROPERTIES OF SYNTHETIC PAINT COATINGS USED IN BUILDING RENOVATION
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND MECHANICAL ENGINEERING
Author(s): WACLAW BRACHACZEK
Abstract: The article studies the structure of protective coatings containing organosilicon polymers with different chemical structure, used in the building renovation. The relation between the contact angle of the cured coating and the type of the organosilicon polymer is analyzed. It has been found that the water-repellent properties of the coatings are influenced by the composition of these polymers. Using spectroscopic studies, the mechanism of hydrophobisation of coatings was explained. The analysis of spectral maps along the cross section of the coatings has shown polysiloxane additives migration from the substrate into the coating/air interface. The arrangement of polysiloxanes in cross-section of the coatings was varied and depended on the weight fraction of organic resin in the paint formulation and the chemical composition of polysiloxanes. Tests were carried out using an IR Continuum microscope. The analysis was conducted on cured coatings derived from acrylic paints containing polysi
- Publication Date: 29-Dec-2015
- DOI: 10.15224/978-1-63248-083-5-21
- Views: 0
- Downloads: 0