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01 The specific gravity of concrete is related to its label, and different materials, strength and actual weight are different. If the plain concrete surface is about equal to the ton, the reinforced concrete surface is about equal to the ton. Lightweight concrete with ceramsite as coarse aggregate, about or tons.
The specific gravity of concrete is related to its label, and different materials, strengths, and actual weights are also different. If the plain concrete surface is about equal to the ton, the reinforced concrete surface is about equal to the ton. Lightweight concrete with ceramsite as coarse aggregate, about or tons.
Abbreviated as "concrete (tóng)": refers to the general term of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. In general, the term concrete refers to cement as a cementitious material and sand and gravel as an aggregate.
Cement concrete, also known as ordinary concrete, is made by mixing water (including admixtures and admixtures) in a certain proportion and is widely used in civil engineering.
The production method of concrete is as follows:
1. Mix ratio design:
First of all, according to the requirements of the project, select reasonable raw materials and mix ratio. The main mix ratio of concrete is the water-cement ratio.
2.Mixing: According to the construction requirements and conditions, the concrete can be mixed on site or centrally.
A self-falling mixer can generally be used for mixtures with good fluidity, but if the fluidity or hardness of the concrete mixture is low, it is recommended to choose a compulsory mixer for mixing. Pay attention to the feeding sequence and mixing time when mixing, otherwise it will have a great impact on the quality of concrete.
3.Transport & Pouring:
The concrete mixture can be transported to the construction site by hopper or transport vehicle. It is then poured manually or mechanically. The efficiency of concrete pumping and pouring is higher, reaching hundreds of cubic meters per hour.
4.Maintenance: Concrete needs to be cured after construction, and different curing methods have different effects on the performance of concrete.
There are natural curing, steam curing, wet and dry curing, autoclaving curing, and so on. The maintenance standard adopted in China is a temperature of 20 3; The humidity is not less than 90%.
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Concrete is not resistant to high temperature (fire), and in special concrete, only heat-resistant concrete is known, and its standard value of bulk density is the same as that of ordinary plain concrete, which is 24kn m, (i.e. tons per cubic meter).
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The solidified concrete is 2,500 kilograms per cubic meter, and the cast-in-place non-solidified concrete is about 2,700 kilograms per cubic meter.
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The bulk density of ready-mixed concrete is generally 2330-2400kg
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The weight of plain concrete is tons, it does not change much with the label, and the weight of reinforced concrete is in tons.
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The specific gravity of each square of various concrete is about the same, which is about 2400kg per cubic meter.
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There is about one to two tons per side.
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The general concrete is about 2350 24000kg, depending on what kind of concrete.
There are three types of concrete: heavy concrete (about 2,500 kilograms of cubic meters), ordinary concrete (about 1,950 to 2,500 kilograms of cubic meters), and light concrete (about 1,950 kilograms of cubic meters);
And lightweight concrete is also divided into the following three categories:
1. Light aggregate concrete is about 800 1950 kg cubic meters.
2. Hollow concrete (foam concrete, aerated concrete) is about 300 1000 kg cubic meters.
3. Macroporous concrete (ordinary macroporous concrete, light aggregate macroporous concrete) is about 1500 1900 kilograms of cubic meters.
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01 The specific gravity of concrete is related to its mark, and different materials, strengths, and actual weights are also different. For example, one side of plain concrete is equal to about tons, and one side of reinforced concrete is equal to about tons. Lightweight concrete, with ceramsite for coarse aggregate, is about or a ton.
The specific gravity of concrete is related to its label, and different materials, strengths, and actual weights are also different. For example, one side of plain concrete is equal to about tons, and one side of reinforced concrete is equal to about tons. Lightweight concrete, with ceramsite for coarse aggregate, is about or a ton.
Abbreviated as:"Concrete (tóng).": refers to the general term of engineering composite materials that cement aggregates into a whole by cementitious materials. The word concrete usually refers to the use of cement as cementitious material, sand and stone as aggregates; Cement concrete, also known as ordinary concrete, is widely used in civil engineering engineering when it is mixed with water (which can contain admixtures and admixtures) in a certain proportion and is mixed to obtain cement concrete.
The method of making concrete is as follows:
1. Mix ratio design:
First of all, according to the requirements of the project, select reasonable raw materials and mix ratio. The main mix ratio of concrete is the ratio of water to ash.
2. Mixing: According to the construction requirements and conditions, the concrete can be mixed on site or centrally. Generally, the flow Xiaohui Tong has good dynamics, and the mixture can choose a self-falling mixer, while if the concrete mixture has less fluidity or dry hardness, it is recommended to choose a compulsory mixer for mixing.
When mixing, pay attention to the order of feeding and mixing time, otherwise it will have a great impact on the quality of concrete.
3. Conveying and pouring:
The concrete mixture can be sent to the construction site by hopper or transport vehicle. Then it is poured by hand or machinery. The efficiency of concrete pumps to convey irrigation is higher, up to hundreds of cubic meters per hour.
4. Curing: After the construction of concrete, it is necessary to cure, and different curing methods have different effects on the performance of concrete. Generally, there are natural curing, steam curing, dry, wet and hot curing, autoclaving curing, and so on.
The maintenance standard adopted in China is a temperature of 20 3 °C; The humidity is not less than 90%.
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One side of the concrete is heavy.
The density of ordinary concrete is 2000-2800kg m3, which is the weight of concrete per cubic meter. Of course, the specific weight of different concrete sources is different, and the weight of each concrete will not differ from each other and be too large, for example: plain concrete is a ton, reinforced concrete is a ton, and ordinary concrete is a ton.
What is concrete
Concrete, as the name suggests, is a general term for engineering composite materials cemented by aggregates cemented by hail belts. Generally, according to the different uses, the proportioning method is also different. In addition, it is affected by factors such as temperature and humidity.
Generally speaking, the density will change, but the current common concrete can be roughly divided into three types: heavy concrete, ordinary concrete and light concrete according to the apparent density.
Concrete can be in these three categories
1.Light aggregate concrete.
The apparent density is 800-1950kg m, which includes pumice, volcanic cinder, ceramsite and slag.
2.Empty concrete.
The apparent density is 300-1000kg m, and it is made of cement slurry and foam. Aerated concrete is mainly made of cement, water and gassing agent.
3.Macroporous concrete.
The apparent density is 1500-1900kg m, which is prepared by crushed stone, soft stone and heavy slag.
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One side of concrete in tons cubic meters.
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The weight of a cubic meter of mixed concrete is about 2400 kg and 2500 kg, and the weight of each type of concrete is different, because the proportion of ingredients is different. For example, C30 grade concrete, which is commonly used in the main body of rural construction, requires 350 kg of cement and 1,250 kg of gravel per cubic meter, and its weight is about 2,480 kg.
Concrete is a building material formed by mixing cement, crushed stone, fine aggregate and water in a certain proportion. Concrete has the characteristics of compressive resistance, frost resistance, corrosion resistance and so on after hardening, and it can be divided into C15, C20, C25 more than a dozen grades according to the compressive strength.
Types of concrete.
There are many concrete construction technologies, which can be roughly divided into centrifugation, vacuum, grouting, spraying, rolling, extrusion, pumping, etc. Different forms of construction technology produce different finished products.
According to the use of the function classification, there are structural concrete, waterproof concrete, hydraulic concrete, radiation-proof concrete, etc. Users should choose the right concrete according to their different needs. For example, waterproof concrete is suitable for wet environments such as toilets.
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