Civil Samadhan

दोस्तों हम जानते हैं कि,  M20 का मिक्स रेसीओ ( Mixed Ratio) मे 1 भाग सीमेंट 1.5 भाग रेत और 3 भाग एग्रीगेट होता है l M20- 1:1.5:3  जहाँ, M का मतलब मिक्स और 20 का का मतलब कंक्रीट की करेक्टरेस्टक एस्ट्रेंथ 20 किलो न्यूटन / वर्ग मिमी l

  1 बैग सीमेंट कितने घन फीट होता है?  दोस्तों, हम जानते हैं कि,  सीमेंट की घनत्व (density) 1440 किलो/घन मीटर होता है l यदि हम इसको घन फीट मे बदले तो,  1 घन फीट= 1440/35.28=40.81 किलो होगा l चूकिं, हम जानते हैं कि 1 बैग सीमेंट= 50 किलो होता है l इसलिए,  1 बैग सीमेंट =50/40.81= 1.225 घन फीट होगा l Thanks 🙏

Required of bricks in 1 square meter: Generally, the size of bricks at site we found that, 230mm length, 115mm width, and 65mm thick.  If we assume 10mm thick mortar then the nominal length will be 240mm and thickness will be 75mm. Diamention change, mm to meter Length=240mm=0.24m Thickness=75mm=0.075m Now, we are calculating the area of 1 brick                            = 0.240×0.75                           = 0.01824  square meter Now, we are find nos. of bricks in 1 square meter Nos. of bricks= 1 square meter/ area of 1 brick Nos. of bricks=1/0.01824=55.55~ 56 nos.  If brick wall is 4 inch thick then, Nos. of bricks in 1 square meter = 56 nos. If brick wall is 9 inch thick then, Nos. of bricks in 1 square meter = 112 nos.  Variation in nos. bricks occure in following conditions: The number of bricks in 1 square meter are varies on following factors: The length of brick, thickness of brick and the thickness of mortar used in masonry work.  If the size of bricks increased and the th

Cube Test: In this test chque a compressive strength of concrete. Take a cube mould which dimentions are 150 mm×150 mm×150 mm (l×b×h) symultenouly.  Also used a tamping rod of 16mm dia.Before the filling of cube mould apply the oil in the internal surface prolerly by which mould open eayly and surface be come smooth. On the cube writedown the casting date, grid number, footings, columns, beams, or slab.  After 12 hours remove from mould and sink in quring pond. Generly we are cast 6 cubes, 3 cubes test after 7 days and 3 cubes test at 28 days. If you can test at 14 days then need to be cast of 9 cubes. In each test take 3 cubes and consider avrage value of all 3rd.After 7 days concrete cubes dry prolerly in the persence of sun.  Weight the cube one by one and writedown. The each weight of concrete cube not less than 8.1 kg. How we proove that the weight of concrete cube should not be less than 8.1 kg. Given dimentions of cube are length =150mm=0.15m, width=150mm=0.15m, depth=150mm=0.15

Beam: Beam is a horizontal structural member spacing and distance between one or more supports and carrying vertical loads across its longitudinal axis.  Types of bean: Beams are mainly of six types, which are given below. 1. Simply supported beam: In this type of beam supports act at the end of beam. 2. Cantilever beam: In the cantilever meam one end fixed and other end is free. 3. Overhanging beam: If the end portion of the beam is extended beyound the support such as a beam is known as overhanging beam. 4. Contineous beam: In this type of beam more than two supports act. Contineous beam is a longer beam. 5. Fixed beam: In this type of beam both ends are fixed. 6. Propped cantilever beam: In this type of beam one end fixed and other end roller support. It is used in bridges.

Column: Column is a vertical member of a structure, which is support the structure, load transfered by the hole through the beams. After that column transfers the load to the footing and footing further transfer it to the soil. Columns are classified into four categories on the basis of shape, slenderness, reinforcement, loading.  1. Based on the shape: 2. Based on the slenderness ratio: 3. Based on the reinforcement: 4. Based on the loading:

Slab: Slab is constructed to provide flat surface usually horizontal in building floor, roofs, bridges, and other types of structures.  The slab may be supported by walls, by reinforced concrete beams usually cost monolithically with the slab, by structural steel beams, by columns or by ground. There are 16 diffirent types of slab in construction. Some of them are outdeted and many of them are frequently used every where Types of slab: 1. Flat slab: The flat slab is a reinforced concrete slab supported directly by concrete columns or caps.Flat slab does not have beam so it is also called beamless slab. Thickness of flat slab is minimum 200 mm or 8".At the top provide plain celling surface giving better deffusion of lite.This types of slab are provided in parking. Thickness of flat slab is minimum 200 mm or 8".At the top provide plain celling surface giving better deffusion of lite.This types of slab are provided in parking.

Slump cone test: This test is performed to determine the workability of fresh concrete.  Appratus: In this test we take a mould of cone shape which top dia is 100mm and bottom dia is 200mm and height is 3000mm. For the compaction of concrete we take a tamping rod of 16mm dia and 600mm length. Procedure of slump cone test: Clean the internal surface of the mould. Fill the mould with concrete in four uniformly layers. Tamp each layer with 25 strocks to the tamping rod. Distribute the strocks uniformly over the entire cross sections of the mould. The rod should be penetrate every underlaying layer. Strike off excess concrete after the top layer with trowel. Remove the mould slowly and vertically. The concrete will slump or slide. Measure the height of slump in mm. Now, take a sample from ready mixed pland and experment proced acording to above procedure and compare its slump value with following conditions which are given below. Find the workability of concrete by the slump value: 1. W

Concrete: Concrete is a specific mixture of binder, aggregates, water and admixture, which is used to builtup of a building structure.  Concrete=Binding material +Fine aggregates +Coarse aggregates +water+Admixture Types of concrete : Concrete is divided in to three major categories on the basis of use and there properties which are on the basis of binding material, on the basis of proportion and bulk density. We will explain it following.  I. On the basis of binding material: 1. Cement concrete 2. Lime concrete 3. Mud concrete II. On the basis of proportion: III. On the basis of place of cast. 1. In situ concrete 2. Precast concrete  IV On the basis of bulk density : Manufacturing process of concrete: 1. Baching: In this stape find the weight of raw content which are going for mixing.For construction of small scale raw content weight by volume. For large scale construction raw content weight by weight wise 2. Mixing: Mixing process performed by hand mixing, machine mixing and RMC pla