Generally, glass fibre reinforced concrete (GFRC) had intermediate characteristics between rigidity and compressive strength of cement and high tensile strength of glass fibre. Besides that, GFRC shown 20 times of its impact of asbestos cement. This fibre gave two to three times of flexural strength of normal reinforced concrete (Neal et al, 1978). Based on theoretical mechanics of cement and concrete stated that tensile failure began with micro crack and microcrospic separation. As a result, cohesive crack existed where it will produce break on concrete.
Fiberglass competed other materials due its corrosion resistance, ability to withstand elements under heat and cold, despite of both saltwater and atmospheric pollution it retain attractiveness of its finish with minimum maintenance. Automotive: From cars to heavy construction machinery, bodies and bumper, truck beds, armored vehicles include wide range application of fiberglass. Because they are exposed to extreme weather conditions and subjected to wear and tear. Construction: Fiberglass is now widely used in construction of bridges. It has replaced steel reinforcement because it has strength comparable to steel but it is corrosion resistant.
(1997) "Durability of Glass Fiber Reinforced Cement Composites " investigates the hot-water durability of glass fiber reinforced cement composites. The different matrices selected were (a) cement; (b) cement + 25% metakaolin; and (c) cement + 25% silica fume. Glass fiber addition was 5% of weight of the composite. Specimens after normal curing of 28 days were immersed in a hot water bath at 50°C for up to 84 days and then tested in flexure and tension. The addition of glass fibers to the cement matrix significantly improves the flexural and tensile behavior of cement matrix.
This case study aims to resolve the quality problem and offers a means to examine the legal and ethical issues involving the protection and misappropriation of RWC’s trade secrets within five (5) working days. 2. Basic Issue(s) or Associated Issue(s) The quality problem must be resolved. As with the first step, I need to figure out the problem and be able to solve the quality problem with GRI by evaluating competitive companies, product and their customers. Since I came from RWC and acquired knowledge and experience from them in the wire rope industry, I should be able to answer the questions, “What does RWC do better than GRI?
Reinforcement had impact resistance, stiffness and tensile properties. It improves fatigue life and corrosion resistance. Matrix phase: The first of these composite materials consisted of glass fibers held within a polyester resin matrix, and later rackets went on to encompass
Compression moulding When the raw material has reinforced fibre in it, a compression moulded part of it acts as the fibre reinforced plastic. Thus the cavity gives a detailed geometry to the fibre on the application of the heat and fibre thus it helps to form complex and creative forms which is highly precise. Autoclave or vacuum bag In this the open moulds are used where in the matrix and the fibre is placed and the heat and pressure is applied whereas the air present is evacuated by the means of vacuum. The exact laminate forms ensure the safety and strength in the industry. MANDREL WRAPPING In this the prepreg is wrapped around the aluminium or steel mandrel.
Research Statements My research interest span the 3D simulation and experimental approach to the use of High Performance Fiber Reinforced Autoclaved Aerated Concrete (HPFR/AAC) with a focus on architectural application. I am particularly interested in fiber reinforced concrete technology used to optimize some mechanical properties of final products. During my master’s degree, I applied this principle in my thesis research titled, “Behavior of Steel-Polypropylene Hybrid Fiber Reinforced Concrete”, which is focused on mechanical behavior of concrete elements based upon fiber types and volume percentage. As a civil engineer, I am interest in investigating an alternative material with excellent properties as a substitute for ordinary concrete which is one of the key challenges that building engineers and architects tackle every day. Literature In Recent years, concrete as one of the oldest construction material, has been widely used in construction
Cohesiveness is affected Aggregate grading and water content. c) Strength Strength of concrete is usually determined in terms of compressing strength. In cases where strength in tension or in shear is of primary importance the compressive strength is frequently used as a measure of this property. Factors affecting strength of concrete are as follows: • Water cement ratio: the strength of concrete depends upon strength of cement paste, & strength of cement paste depends upon dilution of paste. • Aggregate cement ratio :The strength may vary from different aggregate cement ratio.
The flexural strength of self compacting concrete is much higher than that of ordinary concrete. Imparting prestress in self compacting concrete members makes sections even lighter and reduces the overall dead weight of the member. This technology is ideal for rail and highway bridges. By providing parabolic and eccentric tendons moment can be easily counteracted. OBJECTIVES Increase the load carrying capacity of a simply supported beam using a Shape Memory Alloy wire as a prestressed tendon, instead of steel
The mechanical properties of concrete determined in the laboratory include compression strength, splitting tensile strength and flexural tensile strength. The influence of partial replacement of fine aggregates by copper slag on the compressive strength, split tensile strength on cylinders and flexural strength of prisms has been evaluated. The test results showed that there is a possibility of use of copper slag as fine aggregate in