วันอังคารที่ 7 ธันวาคม พ.ศ. 2553

Portland cement material call mean. High temperature Concreteness.

Portland cement material called mean. One compound with the ground powder which when mixed with water according Ratios that fit and leave it for a while it hardens. By humans in ancient times, when I discovered that some rocks to make fire and shattered to pieces And ground thoroughly, then mix them in water for a wicked time. Will yield a solid mass. To shape the Portland Today Cement is made from a material that has elements Al or silica clay or laterite, including humus, which is iron mixed together.
10.1 Type of Portland cement
Cement is divided into various types as follows.

10.1.1 Portland Portland (Portland Portland cement).
This type of object was first to the city of Portland. In the UK. Land consists of Portland, limestone (Limestone) and clay (clay) In addition, it is mostly iron oxide (Fe2O3), and colonies do not post (MgCo3) is small. Portland Portland common in our house that is commonly used (brand Tiger Elephant Brand cobra) typically gray greenish (greenish gray), and it weighs about 92 lb / ft 3 when the raw material of Portland, which are compounds of oxides of elements. calcium, silicon, aluminum and steel, these substances react chemically together, and gathered in compounds in the clinker. In the form of extremely fine crystal.
Compounds of portland Cement.
The name of the compound. Chemical composition, initial

Tri-calcium silicate 3 CaO. SiO2 C3S.

Dicalcium silicate, 2 CaO. SiO2 C2S.

Tri-calcium aluminate Net 3 CaO. Al2O3 C3A.

State brand calcium aluminate amino Ferenc Wright 4 CaO. Al2O3. Fe2O3 C4AF.

C3S Portland to strength quickly within 14 days.

C2S Portland cement the strength slowly. Heat more often.

C3A Cement reaction cause the heat starts coagulation. The strength soon.

C4AF has slightly less strength added to reduce warming occurring.



Number of compounds in the Portland cement properties, such as change of Cement Portland cement strength to fast or slow Period of the formation and solidification may speed up or slow down. Heat from the reaction between water and Portland cement may be higher or lower etc.

Types of Portland Portland cement. The American Society for Materials Testing (ATM.C.150).

(Type IV) and the Thailand Industrial Standards Institute (Am.o.u. 15) Portland Cement divided into five main types of types.

1. Ordinary portland Portland cement (Normal Portland Cement) for regular job that does not need special features such as Portland Portland Elephant. Branded green serpent. And branded diamond single

2. Portland Portland cement modified (Modified Portland Portland cement) for use in making Concreteness temperature due to climate, high temperature Concreteness edge Or industrial products, heat-resistant and sulfate medium such as a Concretely dam wall thickness or Concreteness pipes are large Portland pillar seal seven-headed serpent.

3. Portland Portland cement, high early strength. (High-Early-Strength-Portland Portland) or Portland Cement. Cement is high in the first phase is a powder texture than ordinary portland Portland Concrete to be useful to have to run faster. Or demolished as a quick pile of Concrete road surface and beams to remove the quick lime, etc. This type of Cement, including big brand Erawan Valley. Brand Naga red And three-diamond brand.

4. Portland type Portland cement, low heat (Low-Heat Portland Portland cement) can reduce the amount of heat due to a combination of Cement with water, which can Reduce the growth and shrinkage of Concretely after coagulation. Most used in the construction of a dam. Because the temperature of the Concretely under different types of work not suitable for structures over Due to slow coagulation.

5. Portland Portland. High sulfate resistant. (Sulfate-Resistant Portland Cement) in areas where water or soil with high pH value range of slow coagulation. And actions of the Valley Tong severe effects such as Portland brand shark



There are also other types of Portland cement such as purtland pozzolana Portland cement is ideal for Concreteness buildings in the sea. Silica, a mix of Portland cement. (Ordinary portland Portland and sand from 25 to 30%), including Tiger brand Cement brand Cobra and Eagle Brand. Low-cost hardened me. Do not rely on contractors or contract with a road surface brick pillar cast Concreteness pipes pour container. Tile roof and quarters etc.

10.1.2 Portland nature (natural Portland).


This type of Portland cement made of stone mined in the soil, which is similar to Portland Portland cement mixture is then. By removing the burnt rock. But the fire did not burn a high-heat Portland Portland. When burned, then I grind to dust. This type of Portland, water quality in the same strength. But there are a lot lower than Portland Portland and contains uncertainties. It depends on the properties of the natural stone.

10.1.3 enough Portland left solar Na (pozzolana Portland cement).


Enough Portland left, sometimes called solar Na. Lactic Portland (slag Cement) made with lime and remove waste (slag) from kilns or enough steel left the solar Na, and their natural volcanic rock mixed together. And ground thoroughly. Roman Portland was used in ancient times as a Portland cement This is not hard as Portland type Portland Portland cement. When mixing mortar or Concreteness to create a good sticky. And harder to break or cause Portland Concrete with Portland Portland cement. Works well in salt water in and suitable for use in water or in damp, such as foundations and underground water pipes throughout the beyond.

10.1.4 Portland Al Nas (aluminous Portland cement).


Alumina Portland cement Nas first made in France by removing the said site (bauxite), a mineral that contains aluminum and very expensive, mixed with lime and then burn. Thereafter, the ground thoroughly, as well as to Portland Cement. This type of Portland cement that is fast Mixed with portland Portland cement Concreteness when casting this type and has 24 hours and are equal Tsu cast Concreteness Portland Portland Concreteness piles 3 months, which may be cast with this type of Cement used to strike. When the cast was only 24 hours only.

This type of Portland, when used in a very cold climate, it is by Not prevent a cold, low post portland Portland. When taken this type of Portland mixed with water will cause more heat, which is protected. Not with cold hard Concreteness first. Concretely is mixed with Cement, then when frozen (between 4 to 6 hours) must be watered or covered to keep moist until 24 hours to compensate for water evaporation caused by heat, while the Concretely hardens.

10.1.5 silica Portland (sillica Cement).


Silica Portland is Portland Portland cement mixed with sand, which led to lower prices by grinding Portland Portland Posted May Tablets, 70 percent mixed and 30 percent sand, gypsum, mixed with a little down. Britain and other European countries, most Cement is this type are widely used. Domestic fuels rarely used type of Portland cement is usually very It uses less fuel in the production of Portland Portland cement. Most of the standard silica Cement. The lowest part of the Portland Cement mix to 50 percent Cement, silica Portland cement seal tiger in Thailand is Thai Cement company. Portland Brand cobra Portland cement Company Limited Irrigation. Eagle Brand Portland and Siam City Cement Public Company Limited.
10.2 Manufacture of Portland


Portland cement production with both burning dry (semi - dryprocess) and burn wet (wet process), which processes and overall production will like, but differs in step 2 as shown in the following, which. production processes are as follows.

To burn the dry Portland cement production process step is to take raw materials and elemental alumina silica elements, which are much in humus With iron, which is a lot of laterite Mixed in proportion. Ground information and the attack on the water as water, soil, and then be burnt in the kiln (Portland kiln) until the chemical reaction binding the granule that is called clinker (clinker), when the Portland cement to the ground. It is combined with gypsum Cement as needed.

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