Made from a mix of cement, aggregate, and water the different types of aggregate and ratio of materials used will give different types of cement with slightly different properties. To pour concrete where the depth is more, use a chute or additional labour. Sand shall be of standard specifications, clean and free from dust, dirt and organic matter. Plain concrete is strong in compression, but it is weak in bending. View Mobile Number. The PCC is laid in layers not more than 150mm thick. PCC Works Purpose Of Using PCC 1. 1. Plain cement concrete is laid on the soil surface to avoid direct contact of reinforcement with soil and water. Fine and coarse aggregates. The de-watering should be carried out at a similar time during concreting if there is a high water table. Material is equal to material ratio/ratio sum x dry volume. The use of short, discontinuous fibers to strengthen and toughen such materials, which are much weaker in tension than in compression, goes back to ancient times. The maximum permissible limits for solids shall be as per IS 456:2000 Clause 5.4, Page No 15. To convert a quantity of a substance or material expressed as a volume to mass we simply use the formula: mass = density volume We want to calculate the mass in tonnes from a volume in cubic meters. Plain concrete is a brittle material with low tensile strain and strength capacities. And, 75% of the required amount of water is added to the sediment and mixed with the help of shovels. This is provided as based concrete for laying the foundation and flooring. For PCC concrete works, generally, M15 is used. Solids are subject to the maximum allowable limits specified in IS 456:2000 Clause 5.4, Page No. Generally, M5, M10, M15 grades of concrete are used for PCC (plane cement concrete) work like leveling course, for bed footing etc. Before 25% of the mixing time has passed, the complete amount of water must be added, and it must be controlled to reach the desired water-to-cement ratio.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'constructionor_com-leader-1','ezslot_10',113,'0','0'])};__ez_fad_position('div-gpt-ad-constructionor_com-leader-1-0'); To produce a plastic mix with consistent colour, the mixing must be complete. Some of the uses of plain cement concrete are: a. Never allow the use or use of gameless for batching, that is, the measurement of total quality. Fill in the empty areas; involved parties names, addresses and phone numbers etc. ~ It should have a high degree of fineness. A wooden tampering rod would help achieve uniformity and assure all the corners are completely walked. It is used for leveling, bedding for footings, grade slabs, concrete roads etc. In this article you'll learn: 1 Plain Cement Concrete (PCC) is also called as Cement Concrete (CC) or Blinding Concrete. To prevent direct contact of reinforcement with soil, because when moisture available in the soil is absorbed by R.C.C result in causing corrosion of steel reinforcement. A plain cement concrete with a mix ratio of 1:2:4 is normal concrete with cement content about 14%. It is simply a mixture of cement, sand, and aggregate containing a suitable proportion of water. Although concrete is used as construction material nowadays. It is possible to mix the mixture, ie, fly ash and cement are mixed in the exact quantity or proportion otherwise construction chemicals may be overused. This process is called the compaction of concrete. A pit height of no more than 1.5m is appropriate to pour the concrete. The sand layer a consolidated and dressed to the required level and slope. 5. Water acts as a lubricant for the aggregate and makes the concrete workable. Lets take a detailed look into each of the above-mentioned three methods of concrete mixing. 2. ~ Generally, stone ballasts passed through the square sieve of 20 mm and retained in the square sieve of 5 mm are used as coarse aggregates. Depression is then formed in the centre of the mix, and the required quantity of water is added to this dry mix. Generally, potable water shall be used having a pH value not less than 6. The Purpose of providing PCC Bed is to have a uniform level surface for foundation and flooring. Ratio of water and cement is . Segregation of concrete. This method is used when a small quantity of concrete is needed. RCC Column Process in Construction (2021), What is Building Foundation- The Complete Guide (2021). Hand-mixing is usually the technique of mixing PCC in small small-scale work. Calculate portland cement concrete or PCC concrete mix design ratio in Cft and determine exactly how much quantity of cement, sand and aggregate is required for PCC construction. 1. Note: This is the official SSC JE 2017 Qs. a. Plain concrete, also known as plain cement concrete or PCC, is most commonly used for paving and flooring. For a smooth finish, dont allow more cement mortar to be applied to PCC. The total quantity of water for the mixing shall be introduced before 25% of the mixing time has elapsed and shall be regulated to achieve the specific water-cement ratio. Water. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Hand mixing of concrete is done on a rigid, clean, and non-porous base made of masonry or flat iron sheet plates. PCC concrete is laid in a thickness of 100mm to 150mm to prepare a surface for the foundation. It is preferable to use 40-millimeter aggregates. Concrete Grades M 25, M 30, M 35 are used for RCC (reinforced cement concrete) such as foundations, footing columns, beams, slabs, etc. By serving as a foundational layer of protection for the building above it, PCC performs a significant function. Fine aggregate shall be of coarse sand consisting of hard, sharp and angular grains and shall pass through a screen of 5 mm square mesh. Cover the concrete with sand, gunny bags, or quick-drying materials. The consent submitted will only be used for data processing originating from this website. Before starting any RCC masonry work directly on the excavated soil, the PCC concrete is made to form a flat surface and it is avoided to keep the concrete perpendicular to the soil so that the mixture is mixed with the soil and the water removed by the PCC It can also be weakened to prevent soil. Height should not be more than 1 m. For deeper footings, use chute of longer length and adjust . Water is only the ingredient that reacts chemically with cement and thus setting and hardening takes place. When you join you get additional benefits. M-30 Mix Designs as per IS-10262-2009; Used as Reinforced Cement Concrete(RCC). City, State. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page. Administer the hand compaction and make sure it is completed within the phase where the initial selling starts. When it comes to mixing concrete, the following three mixing methods are used for the production of effective and good-quality concrete. Take care to sprinkle water and ram in foundation pit before placing plain cement concrete in foundation. It is mostly applied over brick flat soling or devoid of brick flat soling. Excellent Water Resistance Characteristics. Use the chute or additional labor to pour the concrete where the depth is more. Its compressive strength is 25 MPa. Different constructions require different types of concrete admixture. Concrete technology deals with the study of properties of concrete and its practical applications. ~ Portland Cement ( commonly OPC) is used in the Plain Cement Concrete. The general specifications of materials used in PCC are . Sea sand shall not be used. A P.C.C mix of 1:1.5:3 is an example of rich concrete with a cement content of 18%. The mixing of cement is done thoroughly by adding sand and cement. Normal concrete is mostly used in damp proofing course, R.C.C, and floor finishing. A determined amount of water should be added to a bucket of cement in accordance with the w/c (water/cement) ratio. A mixture of cement, fine aggregate (sand), and coarse aggregate without reinforcement. Plain cement concrete provides a leveled surface for foundation, and flooring typically cement , sand and aggregate in a proportion of one is to three is to six or one is the four is to eight is used. The usage of cement is reduced when the aggregate size is greater. Production of structural steel demands 8000 kWh/ton or more to make which is almost 3-10 times the energy consumption. d. Shuttering used in the PCC work should have the same size and thickness. The measured amount of sand is spread over the platform and then the cement is spilled over the sand. It is commonly used in the construction of the column foundation, massive gravity dams, flooring, etc. Required fields are marked *. ~ Water should be free from oils, acids, alkalis, salts, and vegetable growths. The most important binding materials are cement and lime. Please enter your email address. That is the finding from a Portland Cement Association (PCA) study which measured the solar reflectance index (SRI) of 45 concrete mixes. PCC is laid on the soil surface and acts as a shield for the reinforced concrete against direct contact with soil and water. Connect with us today and let experts take care of all your construction needs. Its importance is increasing every day. The full form of PCC in Civil Engineering is Plain Cement Concrete. After the concrete has begun to harden- that is about one to two hours after it has been laid- it shall be protected with moist gunny bags, sand or any other materials against quick drying. Here only concrete is used for the construction process and no reinforcement is used. Vastu factors to consider for House Construction in India, Floor Plan for a House and its Importance, Plastering in Construction - Constructure, RCC Column Process in Construction (2021) - Constructure, Concrete covering in Construction - Constructure.in. ~ Sea sand is unsuitable for concrete because of its weak bonding capacity. Plain cement concrete (PCC) is commonly used to provide a rigid impervious bed to Reinforced Cement Concrete in the foundation where the earth is soft and not stable. About 25 to 34 litres of water per bag of cement ( 50 kg bag ) is required to make the concrete suitably. There are two terms used on any construction site RCC (Reinforced Cement concrete) and PCC (Plain Cement Concrete) work. Cement is equal to 1/1 + 2 + 4 x wet volume x 1.54 1. The sand shall be of standard specifications, clean and free from dust, dirt, and organic matter. PCC concrete mix ratio is 1:5:10, which Means 1 part of cement, 5 parts of sand, and 10 parts of aggregate. These mix ratios are defined based on the type of construction and power required. Coarse aggregate used in construction must be a mixture of granite or similar hard broken stone, clear from foreign matter such as dirt and dust. Plain or Ordinary Concrete It is also known as pcc or plain cement concrete. Unit Weight of concrete in lb/ft3 Typical concrete unit weight measured in pounds per cubic foot, which is indicated as lb/ft3, so their unit weight in lb/ft3 for PCC (plain concrete cement) is around 133 pounds per cubic foot in dry mix condition which is approximately equal to 3600 lbs per yard, 150 lb per cubic foot or 4050 lb per yard in wet mix and for RCC (reinforced cement concrete) is . To ensure a smooth surface, do not allow extra mortar on top of PCC. Plain cement concrete is a cement mixture commonly used for paving and flooring and is also known as PPC. It is initially malleable in its "wet" state and solidifies over time, gaining strength and durability. If steel is kept in the concrete, then it is called RCC. 7. Not more than 34 lit 1:3:6 mix. Concrete is good enough in compression. Mixing of PCC can be done either manually or by the means of machines : Note: The quantity of water to be used for each mix of 50kg cement to give the required consistency shall be as follows: 2009-2021 The Constructor. Graded coarse aggregate should be used. PCC Concrete is spread on the soil surface before concreting maid structure to avoid direct contact of reinforcement of concrete with soil and water. . 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