civilengineeringstudy

Concrete Mix Design The main components of concrete include cement, sand and stone. And the water and the adjectors are helpful to them. Cement is the bonding agent in the language of engineering. Bali is fine aggregate and stone is of course aggregate. Reacting with water cement, cement + sand + stone has a thickness of element. The whole material becomes solid like stones. But are they like mixing ?? Does not go. Concrete power depends on the ratio of cement, sand, stone, water, and adimator. We speak cement: sand: stone in general language. Such as 1: 2: 3 or 1: 1.5: 3 or 1: 2: 4. But this ratio is not everything. Cement-water ratio is an important issue. The mixture of different size stones in the stone is also very important. For example, if all the stones are 20 mile size, then it will not be good. The smaller size should be smaller than the middle of the stone. That's why a word is associated with stone size. It is "down grade". That means smaller stones than this...

Concrete 1) What is concrete Answer Cement, sand, khoya are the concrete form made in combination of water in a certain proportion to concrete. The pressure of such concrete can be more tolerant. So where concrete is used to tolerate more pressure. For example bed block, gravity, retreating wall and arch etc. 2) Why is concrete very popular in the construction of the building Answer The reasons for the popularity of concrete are a) It can be rolled into any size shape with the help of a shadow. b) It is strong, sturdy and lasting. c) Pressure tolerance is more. d) Do not easily fire. e) It is resistant to noise, heat and moisture. 3) What kinds of concrete are they Answer There are four kinds of concrete. Namely- a) Lime Concrete b) Cement concrete c) R. C. Reinforced Cement Concrete d) Pre-Stressed Concrete 4) Write different types of concrete elements Answer Different types of concrete material are different. Various kinds of concrete elements are mentioned here. a) Lime concrete lim...

VT is used for filling sand-lands. Namely Fine sand Medium sand Coarse sand  Fine sand The type of sand 16 (A.T.T.), which does not leave any remaining, is called fine sand. Usually this type of sand is used for the plaster.  2. Fine sand There is no residual of running No. 8 (A.T.T.M), which is called medium sand. Usually this sand is used to make spices for mantle work. In our country this type of sand is called a local sand.  3. Coarse sand No. 4 (A.T.T.M) is not left to run in the open, they are called thick sand. This sand is more suitable as a concrete finite aggregate. Our country is known as thick sand syli Bali. Unproductive sand is usually called good sand, like foam, fossil, silt, salt etc. This kind of sandal and silt can be in sand and sand. For this reason, the sand should be well-fed before using the construction work. The best ways to know the sand are mentioned below - For the construction, the thick sand fm 1.5 to 3 and the chicon sand fm 0.8 to 1 is r...

The loose material made by the sand quartz grain (sand grain), such as the delta or sandstones. Sand granules are mostly silicon, but sometimes chuny, gypsum-rich or originally volcanic. Because the sandstones are mainly produced by the quartz, pelted rocks, or due to the crystalline rocks, their size ranges from 0.05 to 2.00 millimeters. After the scattering of the rock, the balikanas are mainly transported by water, glacier or air. The amount of girl child in different types of soil is different. There is a maximum amount of silica in gross balloons but there is potassium, calcium and phosphorus in fine clay. In the category of Soil particles, according to the USDA system, the thick, thin, medium, refined and sub-climax ranges range from 1.00 to 2.00, 0.10 to 0.50, 0.25 to 0.50, 0.10 to 0.25 And 0.05 to 0.10 mm. But in the international classification of the soil particles, the girl is divided into two groups, namely - gross (0.20 to 2.00 millimeters) and fine (0.02 to 0.20 millimete...

Testing and maintenance of cement foaming machines Cement foam machines are widely applied in our manufacturing and living, but many people do not pay attention to the detection and maintenance of machines, also do not tell much about the knowledge and maintenance of knowledge, let's concentrate on these knowledge details.1. Check the hydraulic material of the cement foaming machine. Due to the complexity of equipment, we recommend that experts conduct inspection and treatment of hydraulic systems with experience. If the fault is found, check before an operation and repair the entire loop. - Oil is retrieved and the reasons for leak are doped. - Safety valve, hydraulic system, check the steel pipe and hose, accessories, oil cylinder, and any wear and crack (pipe explosion can have very serious consequences) - Check the pipeline from the relief valve from the cylinder entrance so that no external discharge or vomiting is confirmed due to the impact and wear and the integrity of the ...

Manufacture of cement There are generally two processes adopted for manufacturing cement in Bangladesh namely. 1.Wet process. 2.Dry process. Wet process : The manufacture of cement by this process is divided into three stages: 1. Prepaeation of cement slurry. 2.TO obtain cement clinkers. 3.To prepare cement. In the first, the raw materials are mixed together. Generally 3 volumes of calcareous materials are mixed with 1 volume of argillaceous materials. After mixing the materials are crushed in a crushing machine. The crushed materials are put into a wash will where they are finely grounded with addition of requisite quantity of water. The quantity of water used in the wet process is round about 45 present. The grinding of the materials in the wash mail should be such that about 80 to 85 present should pass through no 200 sieve. The mixture now exists a complete homogeneous condition of suspension in water. Such an intimate mixture is termed as slurry. This slurry is sufficiently liqui...

Functions of Various Ingredients of Cement 1.Lime : Lime plays a very important role on the quality of cement because it forms about 63 percent of cement. To from the required silicates and aluminated of calcium, a sufficient quantity of lime must be present. A deficiency in lime reduces the strength of cement and causes it to set quickly. On the otherhand , and excess will make cement unsound and cause its to expand and disintegrate. 2.Silica : Sufficient quantity of silica should be present in cement to dicalcium and tricalcium silicate. Silica imparts strength to cement and usually present to the extent of about 30 present cement. 3.Alumina : It   impartes quick setting property to cement, clinkering temperature is lowered by the presence of requisite quantity of a alumina. But an excess of alumina weakens the cement. 4.Magnesia : Magnesia should not be present more than 2 present in cement. An excess is harmful and will reduce the strength of cements. 5.Iron oxide : It im...