Cement Essays

  • Disadvantages Of Cement

    733 Words  | 3 Pages

    varying form for thousands of years and is the second most consumed substance in the world after water (The Cement Sustainability Initiative, 2009). Concrete is made by mixing water, cement, coarse aggregate, fine aggregates and sometimes special admixtures in required proportions. Cement is the primary constitute of concrete, is produced and used in large quantities. In Malaysia, the cement production was 1846 thousands of tonnes in April, 2016 (Trading Economics, 2016). Aggregates of both fine

  • Disadvantages Of Cement

    801 Words  | 4 Pages

    We define concrete as a composite material which composed of coarse aggregate bonded together with fluid cement. The form of concrete is a mixture of paste and aggregates, or rocks. Cement is one of the important compositions of concrete. To produce concrete, we mix the cement with water and aggregates. After mixing, the water reacts with cement first then bonds the aggregates together and creates a robust stone-like material. Itbecomes a semi-liquid that we can shape, we can pour it into a certain

  • Disadvantages Of Cement Hydration

    1770 Words  | 8 Pages

    Cement Hydration Cement hydration is the chemical blend of cement and water to form hydration products. It takes time and may not proceed to 100% completion. Concrete derives its strength by the hydration of cement particles. The hydration of cement is not a momentary action but a process continuing for long time. Of course, the rate of hydration is fast to start with, but continues over a very long time at a decreasing rate In the field and in actual work, even a higher water/cement ratio is used

  • Essay On Portland Cement

    922 Words  | 4 Pages

    3. Types of cement: Portland cement: The Romans were probably the first people who made hydraulic binders which will harden underwater by mixing lime with volcanic material. In 1824, an English man called Joseph Aspdin discovered the Portland cement by mixing limestone with clay. 1 According to ASTM C 150, Portland cement is defined as “hydraulic cement produced by pulverizing clinker consisting essentially of hydraulic calcium silicates, usually containing one or more of the forms of calcium sulfate

  • Advantages And Disadvantages Of Cement

    2366 Words  | 10 Pages

    constantly looking for supplementary cementitious material such as Quarry sand (QS), Rice husk ash (RHA) and Ground granulated blast furnace slag (GGBS) are the solid wastes generated by industry. To overcome from this problem, partial replacement of cement with GGBS and RHA and partial replacement of natural sand (NS) with Quarry sand can be an economic alternative. The research is carried out in total three phase. In first phase, mix of M 30 grade concrete with replacement of 0%,20%,40%,60%,80% and

  • Ordinary Portland Cement

    1043 Words  | 5 Pages

    presented in this thesis. 3.1 Portland CEMENT Portland cement is composed of a combination of limestone and either shale, clay, sand, or iron. These materials are ground and blended together and heated in a kiln from 2600o F to3000o F. This causes the materials to fuse together to create clinker. Cooled clinker is then ground with gypsum (CaSO4*2H20). The addition of gypsum controls the aluminate chemistry and the setting time of cement concrete. Portland cement reacts with water to form a paste that

  • Importance Of Cement Industry In Nepal

    5221 Words  | 21 Pages

    INVESTMENT OPPORTUNITY IN CEMENT INDUSTRY 5.1 Cement market in Nepal 5.1.1 Background Cement is a most important construction material for all of the infrastructures. It is produced by clinker, gypsum and flyash. The major raw material is clinker which constitutes 97% of cement and clinker is produced from limestone. Use of cement in Nepal was started since 1950s. At that time, cement was imported from India, China, Korea and many other countries. The commercial import of cement was startedd from 1970s

  • Advantage And Disadvantage Of Cement

    9843 Words  | 40 Pages

    1. INTRODUCTION Concrete is the most widely used material in the built environment. Concrete mainly consists of cement, aggregates, water and admixtures. Most of the concrete is made up of aggregates which are inert granular materials such as sand, crushed stone or gravel. Cement acts as the main binding phase in concrete. The expansion of the construction industry it is necessary to develop low cost and more efficient types of concrete while maintaining sustainability

  • Lime And Cement Case Study

    1006 Words  | 5 Pages

    5.1. Preamble Lime and cement are commonly used chemical additives for stabilization of expansive sub-grade soils. Lime is used to stabilize fine grained soils where as cement is effective for granular materials (Little and Nair, 2009). In the present study two chemical stabilizers namely a locally manufactured hydrated lime and imported cement based industrial product ANSS were used for the stabilization of the sub-grade soil. Laboratory tests were conducted on hydrated lime-soil and ANSS-soil

  • Portland Cement Literature Review

    1393 Words  | 6 Pages

    hydraulic cement-based concrete. Designed some concrete structures, such as the Pantheon in The Rome, one of the best of the Roman architecture that survives to nowadays, the name concrete comes from the Latin "concretus", which means to grow together it is a good name for this material, as the chemical hydration process, which mainly occurs over the time scale of hours and days, causes the material to grow together from a viscoelastic, moldable liquid into a hard rigid solid. Cement is known

  • Cement Industry Case Study

    1085 Words  | 5 Pages

    INTRODUCTION THE CEMENT INDUSTRY Cement is one of the core industries that play an important role in the development and enlargement of a country. Cement is fundamentally a mixture of compounds that consists of mainly silicates and aluminates of calcium, formed out of calcium oxide, silica, aluminium oxide and iron oxide. The demand in this industry mainly depends on the rate of activities in the infrastructure, business, real estate and financial sector of the economy. Cement industry in India

  • Discuss The Advantages And Disadvantages Of Cement

    1040 Words  | 5 Pages

    Cement and sand ready to be mixed. There are many types of concrete available, created by varying the proportions of the main ingredients below. The mix design depends on the type of structure being built, how the concrete will be mixed and delivered, and how it will be placed to form this structure. Cement Portland cement is the most common type of cement in general usage. It is a basic ingredient of concrete, mortar, and plaster. English engineer Joseph Aspdin patented Portland cement in 1824;

  • Resin Cement Case Study

    1022 Words  | 5 Pages

    resin cement and the self-adhesive resin cement with and without silane agent. He concluded that silanization appears to be crucial for resin bonding to LDCs, regardless of the resin cement used. The self-adhesive resin cement acted as well as the conventional resin cement. Higashi et al (75) assessed the effect of sandblasting and silanization on resin cement bond strengths to CAD/CAM resin blocks. Twenty four KATANA AVENCIA blocks were divided into two resin cement groups PANAVIA SA CEMENT HANDMIX

  • Blended Cement Case Study

    2110 Words  | 9 Pages

    2.3 Blended Cement The first effort to manufacture more environmentally friendly concrete was producing concrete with blended cement. Proposals have been put forward into formulation ‘blended cement’ where products such as pozzolans are added to OPC with the purpose of decrease the environmental effects of concrete. Generally, a part of OPC is replaced by by‐products from other industries, for instance, fly ash or ground blast furnace slag (GBFS). Chindaprasirt (2008) reported that annually just

  • Calcium Carbonate Cement Research Paper

    1095 Words  | 5 Pages

    Calcium Carbonate Cement The material: Calcium carbonate cement is a material that is made up of carbon dioxide (CO2) that has been converted to carbonate (CO3) and bound to minerals such as calcium and magnesium. It is a white powder-like material that can be used as an aggregate or supplementary cementitious material in construction and could substitute Portland cement. The Concept: The process of making calcium carbonate cement was developed by studying the formational process of coral reefs

  • Case Study Of Cement Industry In Nepal

    5157 Words  | 21 Pages

    IN NEPAL: A CASE OF CEMENT INDUSTRY 5.1 Cement market in Nepal 5.1.1 Background Cement is a most important construction material for all of the infrastructures. It is produced by clinker, gypsum and flyash. The major raw material is clinker which constitutes 97% of cement and clinker is produced from limestone. Use of cement in Nepal was started since 1950s. At that time, cement was imported from India, China, Korea and many other countries. The commercial import of cement was startedd from 1970s

  • Marble Powder Determination

    2221 Words  | 9 Pages

    Since fineness is the major factor affecting the filler effect, hence the marble powder is blended with cement by replacing cement percentage wise in the order of 0%, 5%, 10%, 15%, 20% and the fineness of these samples were determined by Blaine air permeability apparatus. The results of test are depicted below. Table 3.1: Indicating Filler effect of Marble Powder. Sr. no. % replacement of cement by MP Specific surface area by Blaine Apparatus 1 0% 2865 cm2/Kg 2 5% 2870 cm2/Kg 3 10% 2876 cm2/Kg 4 15%

  • Hydration Lab Report

    931 Words  | 4 Pages

    2.3 Hydration of cement Chemical reactions that takes place while mixing cement with water is known as hydration of cement When cement is mixed with water, a certain amount of heat is liberated which is known as heat of hydration. This reaction is exothermic reaction. On account of hydration various products are formed. Different compounds hydrates at a different rate and liberate different quantity of heat • Tricalcium silicate, C3S- early heat of hydration is mainly due to the formation of

  • Self-Compacting Concrete Lab Report

    1793 Words  | 8 Pages

    Department of Civil Engineering, Saveetha School of Engineering, Chennai) rameshbaskar@gmail.com ABSTRACT: Self-compacting concrete was developed in 1980’s to achieve durable concrete structures, with introduction of superplasticizers in the ordinary cement concrete. Since then various tests and experiments are done to reveal its various properties and application. The benefits of SCC

  • Tension Stiffening In Concrete

    3795 Words  | 16 Pages

    This paper presents the results of an experimental study on the tension stiffening response of fusion bonded epoxy coated bars embedded in self compacting concrete (SCC). 18 numbers of direct tension specimens recommended by RILEM standards are used with modified specimen lengths of 40 and 50 times the diameter of the bar. From the study it is concluded that fusion bonded epoxy coating on bars has a negative effect on the tension stiffening of SCC. The reduction ranges from 9.4 % to 32% .The tension