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A technology of foamed concrete and design method, applied in the field of building materials, can solve the problems of easy cracking, large shrinkage, easy water absorption, etc.
Inactive Publication Date: 2013-11-27
TONGJI UNIV
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The dry density of aerated concrete blocks currently on the market is generally (300-850) kg / m 3 The thermal conductivity is between (0.12~0.16)W / (m K), and the compressive strength of the block is (2.5~5.0)MPa. However, the autoclaved aerated concrete block is easy to absorb water and shrinks greatly. After being made into a wall prone to cracks
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Embodiment 1
[0049] 1) The design dry density of ceramsite foam concrete is 750kg / m 3 , choose ceramsite apparent density 600kg / m 3 .
[0050] 2) Determine the amount of ceramsite to be 50%, and choose ordinary portland cement.
[0051] Calculate the amount of cement used:
[0052]
[0053] The calculated cement consumption is 375kg / m 3 .
[0054] 3) Determine the water-cement ratio to be 0.5.
[0055] 4) Calculate the amount of foam:
[0056] The foaming agent is animal protein foaming agent, and the ratio of 1:20 to water is used to prepare foaming liquid, and the foam density is 70kg / m 3 .
[0057] (4.1) The total mass of water (including foam mass) in each square of ceramsite foam concrete (kg)
[0058] (1)
[0059] (4.2) The volume of gas (gas introduced by foam) required for each square of ceramsite foam concrete (m 3 )
[0060] (2)
[0061] (4.3) Foam volume required for each square of ceramsite foam concrete (m 3 ), the ...
Embodiment 2
[0078] 1) Determine the design dry density of ceramsite foam concrete to be 650kg / m 3 , the apparent density of the selected ceramsite is 658kg / m 3 .
[0079] 2) Determine the volume content of ceramsite to be 60%, and the cementitious material is desulfurized gypsum composite cementitious material (non-calcined desulfurized gypsum: slag powder: cement = 40%: 40%: 20%, mass ratio).
[0080] Calculate the amount of cementitious material:
[0081]
[0082] The calculated amount of cementitious material is 232kg / m 3 .
[0083] 3) Determine the water-cement ratio to be 0.50, and use it with polycarboxylate superplasticizer at a dosage of 1.3%.
[0084] 4) Calculate the amount of foam:
[0085] The foaming agent is selected from tea saponin, and the foaming liquid is prepared according to the mass ratio of 1:200 with water.
[0086] (4.1) The total mass of water (including foam mass) in each square of ceramsite foam concrete (kg)
[0087] (1) ...
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Abstract
The invention provides a design method of ceramsite foam concrete, and relates to mixing proportion design and manufacturing of ceramsite foam concrete for producing the ceramsite foam concrete meeting requirements of related specifications. According to the method, the mixing proportion of the ceramsite foam concrete is determined on the basis of a volumetric method, and the density degree of the ceramsite foam concrete can be accurately controlled, so that the ceramsite foam concrete satisfies the required strength and has favorable use value. The method comprises the following steps: determining that the ceramsite mixing amount ranges from 40% to 60%; then determining the consumption of a cementing material according to the designed dry density of the ceramsite foam concrete; designing a workability testing method of newly mixed ceramsite foam concrete for judging an appropriate water-cement ratio; and designing a density control method of the ceramsite foam concrete for controlling the actual dry density of the ceramsite foam concrete to be in the vicinity of the designed dry density. The method can heavily utilize solid wastes (such as desulfurized gypsum, fly ash, sludge and refuse incineration ash, an animal protein foaming agent is prepared from animal hoofs and horns or animal hairs), has the characteristics of waste utilization, environment friendliness, energy saving and high efficiency, and conforms to requirements of sustainable development.
Description
technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a design method of ceramsite foam concrete. Background technique [0002] Energy is the driving force of social development, and the planned and controlled use of energy is an important guarantee for sustainable development. With the rapid development of productivity, the energy consumption of countries all over the world is getting higher and higher, and the global energy supply is becoming more and more tense, and the contradiction between productivity development and energy shortage is increasing day by day. In 1992, the United Nations Conference on Environment and Development put forward the "sustainable development" strategy, which is a new human environmental value and concept of survival and development put forward by people in the face of environmental degradation, energy shortage and other crises. [0003] Since energy production and supply are di...
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Application Information
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