SPECIFICATIONS AND ESTIMATIONS. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The subsequent revisions of these two documents (Bureau of Reclamation, 1975 and 1996), particularly chapter 7 of the Concrete Manual, have formed the basis for nearly all concrete In India, Portland cement was first manufactured in 1904 near Madras, by the South India Industrial Ltd. USES cement concrete is commonly used in buildings and other important engineering works where strength and durability is of prime importance. Wherever possible, we tend to give reasons as to why a particular cement type is more suitable for a given purpose than other types. • For cement concrete of ratio 1:1.5:3 require 7.8no bags of 50kg. 1. cement ppt 1. See our User Agreement and Privacy Policy. Silica (SiO 2 ) 17-25% Provides strength to cement Alumina (Al 2 O 3 ) 3-8% Helps in quick setting Calcium Sulphate (Gypsum) Enhances initial setting of cement Iron Oxide 2-6% Gives color, Strength and hardness. Factors determining job satisfaction of employees, Job satisfaction in Organizational behaviour, No public clipboards found for this slide. Dry lean concrete mix proportions manufactured with PPC Mix no. Specifications For Repair of Concrete, M-47, the first edition dated November 1970. REINFORCED CEMENT DG cement, Maple leaf cement, Askari cement, Pioneer cement, White (40kg-600rs/bag) or grey cement(50kg-350rs/bag) for decorative purpose. Available in MSR and HSR grades. Scope 4 2. Cement is the basic and most important ingredient of cement concrete. 3. • Brand of cement (i.e. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Looks like you’ve clipped this slide to already. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 7. Portland cement is a fine powder, gray or white in color, that consists of a mixture of hydraulic cement materials comprising primarily calcium silicates, aluminates and aluminoferrites. 4. 1. The base coat shall be cement mortar 12 mm thick with a surface coat of coloured cement mortar 6 mm thick. 2H2O CSH2 ~2-6 Tetracalcium 4 CaO. For instance, portland cements and blended hydraulic cements for concrete in the U.S. conform to the American Society for Testing and Materials (ASTM) C150 (Standard Specification for Portland Cement), C595 (Standard Specification for Blended Hydraulic Cement) or C1157 (Performance Specification for Hydraulic Cements). Summary of Cement Compounds Gypsum CaSO4. Chemical Composition of cement is: Lime 63% Silica 22% Alumina 06% Iron oxide 03% Gypsum 01 to 04% Suchismita Sahu, Asst. Prepare mixtures to meet. In the past the specifications for concrete prescribed the proportions of cement, fine and coarse aggregates. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 8 Department of Civil Engineering Notes Compiled By: Engr. But this venture failed. specification No. You can change your ad preferences anytime. Presentation Title: Moving To Performance Specifications For Concrete. These offer simplicity and under normal circumstances, have a … • The materials proportion should be as per the specifications of the concrete. Now customize the name of a clipboard to store your clips. Cement: Cement is the mixture of calcareous, siliceous, argillaceous and other substances. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Typical physical requirements of the various API classes of cement are shown in Table 5. See our Privacy Policy and User Agreement for details. Now customize the name of a clipboard to store your clips. The British standard specification was first drawn up in 1904. c. D2103, Standard Specification for Polyethylene Film and Sheeting. 12.4.1 MATERIALS Cement mortar 1:3 or other specified proportion conforming to the requirements of Clause 3:2. By CTS Cement Manufacturing Corp. Portland cement shall be Type 1 cement in accordance with Section 1001 of the Standard Specifications. B. Clipping is a handy way to collect important slides you want to go back to later. Gives basic idea about cement, manufacturing process, composition, hardening and setting chemistry. Time of storing is also a factor that affects the cement especially its … Approved blended cement shall be used for internal plaster, masonry, flooring, waterproofing and plumbing works. 1.04 SUBMITTALS A. 12.4 18mm THICK COLOURED CEMENT PLASTER – 2 COAT WORK This shall consist of 2 coats. Specify the critical properties and test for them. For all RCC and PCC works, approved by fly ash shall be used. This Specification "Pavement Quality Concrete for Airfields" has been devised for use of the Crown and of its Contractors in the execution of contracts for the Crown and, subject to the Unfair Contracts Terms Act 1977, the Crown will not be liable in any way whatever (including but If you continue browsing the site, you agree to the use of cookies on this website. Date added: 09-18-2020 Al2O3.Fe2O3 C4AF ~5-8 aluminoferrite Tricalcium aluminate 3 CaO. Cement. are 2.65 and 2.7 respectively. The size of the particles of the cement is its fineness. Abdul Rahim Khan (Narowal Campus), UET Lahore Detail specifications of Cement • Detail specifications of cement include. Fineness of Cement. Presentation Summary : Understand what makes concrete last and identify what failure mechanisms we see. SiO2 C2S ~15-20 Tricalcium silicate (Alite) 3 CaO. Design 4 3.1 Type of stores 4 Drawing: Typical cold stores 5 & 6 3.2 Design details 7 3.3 Loads 8 3.4 Miscellaneous 10 3.5 Supporting structure 11 3.6 Fire protection 11 4. Duration of Cement Storage. b. C309, Standard Specification for Liquid Membrane -Forming Compounds for Curing Concrete. Portland Pozzolana Cement (PPC)- is used for marine structures, sewage works, sewage works and for laying concrete under water such as bridges, piers, dams and mass concrete works etc. Sand is used as fine aggregate in cement concrete. In cement concrete useful proportions of its ingredients are 1 part cement:1-8 part sand:2-16 parts coarse aggregates. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The specific gravity of FA and C.A. PORTLAND CEMENT COMPOSITION Lime (CaO) 60-66% Excess reduces strength and make cement disintegrate and in less amount reduces strength and makes it quick setting. These mixes of fixed cement-aggregate ratio which ensures adequate strength are termed nominal mixes. 3. 96) Low film thickness value is preferred ; 11 Cement base. Al2O3 C3A ~5-10 Dicalcium silicate (Belite) 2 CaO. Cement used for construction work should be fresh and it should meet the standard specifications. Provide data on curing compounds, sheet materials, and methods of securing sheet Each batch of ready-mixed concrete is tailor-made according to the specifics of the contractor and is delivered to the contractor in a plastic condition, usually in the cylindrical trucks often known as "cement mixers." ASTM C94/C94M, Standard Specification for Ready-Mixed Concrete, provides standard specifications for the manufacture and delivery of freshly mixed concrete. Chemical properties and physical requirements are summarized in Tables 3 and Table 4, respectively. The basic processes and common techniques are explained in this chapter. The required fineness of … Specification testing of Class F cement slurries requires 38 percent water (100 parts dry cement by weight to 38 parts mixing water by weight) according to API Specification 10A. Portland cement of each of the eight types must have the following chemical compositions: aluminum oxide, ferric oxide, magnesium oxide, sulfur trioxide, tricalcium silicate, dicalcium silicate, tricalcium aluminate, and tetracalcium aluminofernite. See our User Agreement and Privacy Policy. CONCRETE NUMBER OF CEMENT BAGS REQUIRED FOR A SPECIFIC CEMENT CONCRETE RATIOS • For cement concrete of ratio 1:1:2(1 cement:1sand/coarse sand:2graded stone aggregate) require 11no bags of 50kg. You can change your ad preferences anytime. 2. For external plaster approved fly ash as per specification of item shall be used. Rapid Hardening Cement- works best for prefabricated concrete construction, road works, etc. The basic processes and common techniques are explained here. 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