2 Introduction • Concrete has a versatile use in the construction practice • The compressive strength is one of the most important and useful properties of concrete • The design strength of the concrete normally represents its 28th day strength • 28 days is a considerable time to wait for the test results of concrete strength while it is mandatory to represent the process of
FINE AGGREGATE COARSE AGGREGATE Size more than Includes gravels and crushed stones Obtained by crushing various types of granites hard lime stones and sand stones Harsh concrete Size less than Includes natural sand or crushed stone with most particles passing through a sieve Obtained from pits lake river or sea shore
The physical and chemical properties of stone dust are within the ASTM standard limits for fine aggregate used in cement concrete The slump values of fresh concrete range between 27 and 74 mm for
Conversely when silica sand with spherical and regular particles is used as the fine aggregate it results in reduced internal friction within the concrete matrix [45 46] This reduction enhances the flowability particularly in the control mix where 100 % silica sand was used as the fine aggregate and a flowability of 745 mm was achieved
The incorporation of plastic wastes affects the quantity of free water available in the concrete matrix as well as its workability The workability of concrete could rise or decrease as the amount of fine recycled waste plastic aggregate increases depending on the physical properties especially particle shape size roughness surface texture chemical properties of
30 Aggregate whose is required is placed on a standard set of sieves 80 63 40 20 10 mm and 600 300 150 micro m and the set vibrated The material retained on each sieve after sieving represent the fraction of aggregate coarser than the sieve in question but finer than the sieve above
This research describes an experimental investigation that assesses the impact of polymer fiber and artificial fine aggregate on concrete properties Polymer fiber on the other hand has the potential to function as a superplasticizer additive which might lead to concrete s superior elasticity higher strength and reduced rate of water
used as the replacement of fine aggregate in the concrete Concrete cubes were cast taking 10% 20% 30 % 40% & 50% of plastic as partial replacement of fine aggregate and tested for 7 & 28 days of compressive strength of concrete Keywords Waste plastic Compressive strength Workability 1 INTRODUCTION
Artificial aggregates AAs are usually prepared by pelletizing techniques that combine fine moisturizing particles into larger ones The fresh manufactured pellets can be turned into a solid composite aggregate by accelerated carbonation The strength development of pellets can be accelerated at high CO 2 concentrations [8] For example the strength of basic oxygen furnace
The effect of artificial sand and crush sand as fine aggregate in concrete is to substitute the natural sand content in concrete The experimental work is mainly concerned with the study of mechanical properties like compressive strength split tensile strength and flexural strength of concrete by full replacement of natural sand by artificial sand as fine aggregate Common river
2 CONCRETE Concrete is a construction material composed of cement fine aggregates and coarse aggregates mixed with water which hardens with time In building construction concrete is used for the construction of foundations columns beams slabs and other load bearing elements CONSTITUENTS OF CONCRETE Fine Aggregates 25 30%
Material Used Cement Water Aggregate Concrete is prepared by mixing various materials like cement Water aggregates etc which are economically available IS 8112 is used for the work The fine aggregate used in this investigation was clean river sand whose maximum size is mm conforming to grading zone II
Lightweight Aggregate Concrete PPT Free download as Powerpoint Presentation ppt / pptx PDF File pdf Text File txt or view presentation slides online This document discusses lightweight aggregates and their influence on concrete It begins with an introduction to lightweight concrete and methods of producing it including using porous
Infrastructure development and urbanization have created a demand for the prime construction material—"Concrete " The manufacture of concrete has pressurized the aggregate supply chain for over exploitation of natural resources leading to eco detrimental impacts besides environmental regulations The auxiliary sectors of the construction industry
Foundry sand is the raw material required for making metal casting sand molds which are frequently recycled during the casting process Foundry sand loses its quality after repetitive use making it unsuitable for use in the process of manufacturing products and later is subsequently thrown away as waste WFS Ankush et al 2017 High quality silica sand
In this study ground glass powder and crushed waste glass were used to replace coarse and fine aggregates Within the scope of the study fine aggregate FA and coarse aggregate CA were
18 Aggregate Characteristics and Tests Abrasion resistance ASTM C 131 AASHTO T 96 ASTM C 535 ASTM C 779 Freeze thaw resistance ASTM C 666 AASHTO T 161 ASTM C 682 AASHTO T 103 Sulfate resistance ASTM C 88 AASHTO T 104 Particle shape and surface texture ASTM C 295 ASTM D 3398 Grading ASTM C 117 AASHTO T 11 ASTM C 136
Cement water fine aggregate and coarse aggregate can be mixed to make high quality concrete [1] Good concrete whether plain reinforced or pre stressed should be strong enough to support loads throughout its lifespan The experiments showed that replacing 30% artificial fine aggregate for natural fine aggregate produced the maximum
Abstract Concrete is made up of a variety of materials including coarse aggregate fine aggregate cement and water which are mixed in different proportions to achieve a specific strength The most important material cement plays an important role in the production of concrete The high cost of traditional building materials is a major
Used as fine aggregate in concrete 2 coarse aggregate in Portland cement concrete 3 Coarse aggregate in structural Portland cement concrete 4 Coarse aggregate in precast Portland cement concrete 5 Used as coastal guard to prevent soil erosion 6 Construction of pavements to resist skid and abrasion resistance
5 CONCRETE Concrete is a composite material composed of gravels or crushed stones coarse aggregate sand fine aggregate and hydrated cement binder and imparts considerable hardness to the mixture The cement reacts chemically with the water and other ingredients to form a hard matrix which binds all the materials together into a durable
