This work presents a study of the physical and mechanical performance of tests on two different traces of porous concrete, popularly known as permeable concrete. Currently problems related to flooding in areas of excessive occupation of impermeable soil has worried experts in urban drainage, the use of the type of concrete used in this research facilitates the surface runoff helping in the acceleration of the permeability of water coming from rains that cause flooding and floods mainly in poorly planned urban areas. Cement and water were used for the preparation of the samples and in order to ensure a greater safety in the variation of tensile strength of the specimens, 10 samples were made in the last proposed test until a difference rate was reached minimum between the result of the compression analyzes thus making a material that resists to areas related to the traffic of people like sidewalks, catwalks and even bike paths.

This research studies the carbonation phenomenon of cement due to the reaction of its components with water. In this chemical reaction occurs the formation of calcium carbonate and the absorption of CO2 in the atmosphere, which contributes to the reduction of the Greenhouse Effect. However, carbonation also causes pathologies such as efflorescence, staining and corrosion of steel in concrete. This research shows the results of experiments with specimens of concrete permeable, made with cement and big aggregates (calcareous stone) in the ratio of 1: 4.4 (cement: stone) and a factor of 0.3 for water / cement. The specimens were kept in contact with water containing different amounts of CO2 - distilled, ionized alkaline, carbonated, and tap water. After the experiments were carried out, an increase in pH, a mean compressive strength of 12.3 MPa and a permeability rate of 1.28 l / h was observed. The results show that the permeable concrete did not present any pathologies resulting from the carbonation during the period of the research, which recommended the same for use in road pavements.

Concrete is the product most used in small and large buildings and the choice for the type of cement used varies between cost and quality, always meeting the specifications required by the standards. The objective of this work is to compare the results of the mechanical behavior between two brands of cement of the city of Manaus denominated for this research of CP I-T1 and CP I-T2, the choice for the model CP IS-40 is given by the practicality when working with a material of general use when no special properties are required, ie a product that can be applied in different stages of the work. In order to do this, a large number of tests were carried out on both the aggregate and the aggregate, so that it was possible to adopt a trace of concrete with a strict quality control in both brands, tests such as water absorption and resistance to axial compression were performed following a schedule of 07, 28 and 63 days after wet curing of the specimens.

The increase in waste generated by the construction industry (RCC) in recent years, without adequate disposal, has accumulated concerns not only to government agencies but also to the environment and public health in Brazil, which varies from region to region. region. The use of these RCCs incorporated in concrete to reduce these clusters has been a solution increasingly employed by companies in this segment that are concerned with the future of our. Therefore, this study presents a feasibility in the use of marbled residues as a large aggregate in total replacement of crushed stone No. 0 in conventional concrete. For this, laboratory experiments were carried out with the objective of characterizing all the materials used. After the characterization, the axial compressive strengths of the hardened and cured Test Bodies were verified in the ages of 7 and 28 days, divided in two groups with 4 CPs each. The average of the results of the residue with a value of 25.02 MPa and the conventional concrete with gravel, of 27.32 MPa, makes it possible to use the residue for small buildings such as: sidewalks, gutters and small non-structural slabs bearing.

This article is based on the production of concrete with vegetable fiber (buriti), emphasizing the effect of carbonation as a form of prevention in relation to pathological causes caused in reinforced concrete. The structuring of this project is done through the preparation of a conventional concrete as the basis of the study to be applied as addition and / or replacement of cement in 0.5% and 1.0% of buriti fiber. After the rupture at 28 days, these materials were exposed and the chemical indicator of phenolphthalein was applied to be observed at 7, 28, 63, 91 and 120 of the spray.