فهرست مطالب ali sheikh abolhasani

Concrete is the most widely used building materials. In the our country, Iran, the consumption amount of chemical additives materials than to the average consumption in other countries has been a significant distance and especially ready-mixed concrete industry the significant contribution of concrete production and consumption to be allocated in the country. Ready-mixed concrete industry from the most potential sections that should be pay to the valuable characteristics of the chemical additives and used to it. Therefore it is essential that developed the knowledge and technology use of chemical additives materials over the past in Iran. One of the cases that about concrete structures, especially structures that located in the vicinity of water permanent or non-permanent and chemicals materials, is important, blocked effect performance against leakage, influence, pressure or attack water containing chemical materials, addition to it is well tolerance freight its. In this context, should be made concrete that commonly “waterproof” is called. Also, to prevent cracking, high ductility, supernatural strength and energy absorption capability can be used of fiber in concrete that can be found proportional many application instances for it. Up to now specified that different types of fiber can increase strain capacity, resistance to impact, energy absorption, abrasion resistance and tensile strength of concrete. In this research, the influence of the strength of concrete and fiber concrete sealing substances has been investigated. For this purpose, concrete without fibers and fiber concrete with steel fibers, polypropylene and glass, compressive and flexural strength parameters by adding common waterproof material is studied with different percentages. In this study, by using of materials available in the Khormoj and fiber and waterproof materials, concrete parameters is evaluated of pressure and bending resistive. Carrying out tests crash sand in the province of Bushehr was used. All the stone materials in the concrete mix thoroughly washed before using in the S.S.D state. Dashtestan Cement Type 2 Compliant with ASTM C 150 is used for mixing. Thus, was carried compressive strength tests at ages 7, 28 and 90 days on the cubic test pieces and bending strength tests at ages 7, 28 and 90 days on test pieces of the cubic rectangular. Tests taken in 34 mix design and 408 samples so that in the making concrete is used of waterproof materials composition of inclusive powder sbf-wr201 (acidic neutral) and powder bc40 (acidic neutral) and liquid bc39 (alkaline) and steel, polypropylene glass fiber. In this study, a mix design based on ACI 211 recommendations for concrete without fibers by weight method was prepared. Then fibers (polypropylene, steel and glass and 2% respectively, 2%, and 1% by weight of cement) and the waterproof material (with percentages of 1, 1.5, and 2% by weight of cement) were added separately to the concrete mix design and the mix design was calculated for each compound. The tests of results show that the waterproof materials bc40 and sbf increase the strength and flexural compressive and waterproof material bc39 decreases concrete strength and flexural compressive. The most important result of this study is that to add 1 percent of waterproof materials bc40 to the fiber concrete with steel fiber has been increased 27% compressive strength compared than to control sample fiber for strength 90-day and also in the flexural strength of this combination is not seen a significant change.