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Calculation Of Quantity Of Cement, Sand And Brick In Wall

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Assuming 1- Grade of mortar = 1:6 (cement : sand) 2- Class A brick (19 cm x 9 cm x 9 cm) 3- Volume of brick work = 1.0 m^3, (wall size =1*1*1 =1.0 m^3) 4- Thickness of mortar = 10 mm Step 1 :- Calculation of bricks No. of bricks = (volume of brick work / volume of one brick with mortar) Volume of one brick (without mortar) = .19*.09*.09 = 0.001539 m^3 since thickness of mortar = 10 mm (0.01 m) Volume of brick with mortar = (0.19+0.01) x (0.09+0.1)x (0.09+0.1) = 0.2×0.1×0.1 = 0.002 m^3 Number of brick required in brick work volume = 1.0 m^3 therefore, No.of bricks = 1.0/ (0.002)  =  500 Nos. consider the percentage of waste  as 10 % or 15 % Total no. of bricks = 500 + (10 x 500 )/100=550 Step 2 :- Calculation for quantity of mortar Since we need 500 no of bricks volume occupied by bricks = No of bricks x volume of one brick Volume of bricks = 500 x 0.001539 = 0.7695 m^3 Volume of mortar = Volume of brick work – Volume of Bricks...
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TENDERING, ESTIMATING AND QUANTITY SURVEYING – Tendering Methods & procedures

TENDERING, ESTIMATING AND QUANTITY SURVEYING – Tendering Methods & procedures: Tendering Methods & procedures: Methods of Contractor Selection: The selection of a contractor to carry out construction works in a project is a very important matter. A wrong choice may lead to an unhappy client / contractor relationship. It also may end up with dissatisfied client and sometimes even with an insolvent contractor. The client’s professional advisers should find a contracting company; That is financially stable / and has a good business record. For which the size of project is neither too small nor too large. That has a reputation for good quality workmanship and efficient organization. There are three principal methods for choosing a contractor: (a) open tendering, (b) selective tendering, (c) nomination. Open Tendering – Initiated by client’s architect/ quantity surveyor advertising in newspapers and/or inviting contractors to apply for tender documents and to tender...
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CLEAR COVER TO MAIN REINFORCEMENT

CLEAR COVER TO MAIN REINFORCEMENT: 1.FOOTINGS : 50 mm 2.RAFT FOUNDATION.TOP : 50 mm 3.RAFT FOUNDATION.BOTTOM/SIDES : 75 mm 4.STRAP BEAM : 50 mm 5.GRADE SLAB: 20 mm 6.COLUMN : 40 mm 7.SHEAR WALL : 25 mm 8.BEAMS : 25 mm 9.SLABS : 15 mm 10.FLAT SLAB: 20 mm 11.STAIRCASE : 15 mm 12.RET. WALL : 20/ 25 mm on earth 13.WATER RETAINING STRUCTURES : 20/30 mm
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ADMIXTURES

ADMIXTURES A material other than water, aggregates, or cement that is used as an ingredient of concrete or mortar to control setting and early hardening, workability, or to provide additional cementing properties. Why is admixture used? Over decades, attempts have been made to obtain concrete with certain desired characteristics such as high compressive strength, high workability, and high performance and durability parameters to meet the requirement of complexity of modern structures. The properties commonly modified are the heat of hydration, accelerate or retard setting time, workability, water reduction, dispersion and air- entrainment, impermeability and durability factors. Types of Admixtures Chemical admixtures - Accelerators, Retarders, Water-reducing agents, Super plasticizers, Air entraining agents etc. Mineral admixtures - Fly-ash Blast-furnace slag, Silica fume and Rice husk Ash etc. Chemical admixtures 1. Water-reducing admixture / Plastici...
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OPC and PPC

OPC = Ordinary Portland Cement PPC = Pozzolonic Portland cement (FYI : PPC is environment friendly as it consists fly ash in some specific percentages by parts, which is a waste product of burnt coal, usually collected from thermal power plants) OPC (m53) attains strength in a shorter time, while PPC (m43) takes longer. OPC therefore dries more quickly, but produces more heat during chemical reaction during which it gains strength, as compared to PPC. Faster is the drying process, more is the risk of cracking of cement, and therefore it need more care and more amount of water for curing in a lesser time. PPC on the other hand can attain strength equal to OPC, but takes a longer time. For a building slab, PPC is more widely used since it requires less care. The strength depends on design mix (the water cement and aggregate ratio) more than type of cement. so essentially, If you need construction to take place faster and have means for good curing, you may use OPC. But if...
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RCC Column

RCC Column A column is a very important component in a structure. It is like the legs on which a structure stands. It is designed to resist axial and lateral forces and transfer them safely to the footings in the ground. Columns support floors in a structure. Slabs and beams transfer the stresses to the columns. So, it is important to design strong columns. Basis of classification of columns and different types of reinforcement required for a certain type of column. A column may be classified based on different criteria such as: 1. Based on shape: Rectangle Square Circular Polygon 2. Based on slenderness ratio: The ratio of the effective length of a column to the least radius of gyration of its cross section is called the slenderness ratio. Short RCC column, =< 10 Long RCC column, > 10 Short Steel column, =<50 Intermediate Steel column >50 & <200 Long Steel column >200 3. Based on type of loading: Axially loaded column A co...
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Usefull Civil Engineering Calculation

Usefull Civil Engineering Calculation CONCRETEGRADE: M5 = 1:4:8 M10= 1:3:6 M15= 1:2:4 M20= 1:1.5:3 M25= 1:1:2 Weight of Engineering Materials 1.Bitumen – 1340 Kg / M3 2.Cement – 1440 Kg / M3 3.Gold – 19224 Kg / M3 4.Ice – 913 Kg / M3 5.Wrought Iron – 7700 Kg / M3 6.Pig Iron – 7200 Kg / M3 7.Cast Iron – 7650 Kg / M3 8.Lead – 11374 Kg / M3 A.C Sheets – 17 kg / M2 10.Petrol – 690 Kg / M3 CLEAR COVER TO MAIN REINFORCEMENT: 1.FOOTINGS : 50 mm 2.RAFT FOUNDATION.TOP : 50 mm 3.RAFT FOUNDATION.BOTTOM/SIDES : 75 mm 4.STRAP BEAM : 50 mm 5.GRADE SLAB: 20 mm 6.COLUMN : 40 mm 7.SHEAR WALL : 25 mm 8.BEAMS : 25 mm 9.SLABS : 15 mm 10.FLAT SLAB: 20 mm 11.STAIRCASE : 15 mm 12.RET. WALL : 20/ 25 mm on earth 13.WATER RETAINING STRUCTURES : 20/30 mm WEIGHT OF ROD PER METER LENGTH: DIA WEIGHT PER METER 6mm = 0.222Kg 8mm = 0.395 Kg 10mm = 0.616 Kg 12mm = 0.888 Kg 16mm = 1.578 Kg 20mm = 2.466 Kg 25mm = 3.853 Kg 32mm = 6.313 Kg 40mm = 9.865 Kg 1bag cement-50kg 1feet-...
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