General purpose Portland cement based ultra-light physical foamed concrete

A Portland cement and foam concrete technology, applied in the field of concrete, can solve problems such as lack of resources, quality disputes, uneven quality, etc., and achieve the effects of reducing costs, reducing resource consumption, and reducing the use of raw materials

Active Publication Date: 2015-07-15

SOUTHWEAT UNIV OF SCI & TECH

5 Cites 53 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Publication No. CN101508593A discloses "ultra-light thermal insulation foam concrete and its application". Although the ultra-light foam concrete is prepared by physical foaming method, it needs to be realized by adding lightweight aggregate or organic binder, which has the disadvantages of lack of resources and high cost. question

Another example is the "low-cost ultra-low density foam concrete" disclosed by the publication number CN102515664A. Although ordinary Portland cement,...

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Abstract

The invention discloses general purpose Portland cement based ultra-light physical foamed concrete which is characterized by being prepared by mixing, forming and maintaining the following components in percentage by weight: 20-70% of general purpose Portland cement, 0-40% of a type A admixture or/and 0-40% of a type B admixture, 0.5-4% of a type C additive, 0.3-2% of a foaming agent, 0-1% of a water reducing agent, 0-4% of fibers and 25-60% of water. The general purpose Portland cement based ultra-light physical foamed concrete disclosed by the invention has the characteristics of ultra-low dry density, low thermal conductivity, relatively high strength, wide raw material source, low cost, simple preparation process, easy maintenance process selection and the like, is suitable to serve as an earthquake-proof and energy-absorbing material, a lightweight cushion course and a catalyst carrier material in a thermal insulation project, a floor heating project and a back filling project, and is particularly suitable for a building exterior wall external thermal insulation system, a roof thermal insulation system, a composite thermal insulation wall body and a buffer energy absorbing system.

Application Domain

Ceramicware

Technology Topic

CushionPortland cement +16

Image

Examples

Experimental program(31)

Example Embodiment

[0034] Example 1:

[0035] A general-purpose Portland cement-based ultra-light physical foamed foam concrete, the components and weight percentages are: general-purpose Portland cement 48.6%, C-type admixture 1.9%, foaming agent 0.6%, water-reducing agent 0.3%, Water 48.6%; Among them: the general-purpose Portland cement is 42.5 grade ordinary Portland cement, the C-type admixture is made of aluminum sulfate and calcium nitrate, the foaming agent is commercially available animal protein foaming agent, and the water-reducing agent is commercially available Polycarboxylate superplasticizer;

[0036] The preparation method is: first take general-purpose Portland cement, C-type admixture, foam agent, water reducer and water according to the weight percentage; dilute the foam agent and water at a ratio of 1:15 to form a foam agent solution, and place it at a speed of 3000rpm Under mechanical stirring and foaming to obtain foam; dissolve water reducer and C-type admixture into the remaining water of the foam preparation to obtain mixture 2; add mixture 2 to cement and stir to form a uniform slurry, add foam, stir evenly and directly Pour it into the mold and form it. After forming, it is demoulded after 72 hours of curing with the mold. After demoulding, the standard curing is adopted for 28 days to obtain ultra-light foamed concrete.

[0037] The apparent density of the general-purpose portland cement-based ultra-light physical foaming foam concrete that this embodiment makes is 175.2kg/m 3 , the thermal conductivity is 0.0516W/(m·k), and the 28-day compressive strength is 0.33MPa.

Example Embodiment

[0038] Example 2:

[0039] A general-purpose Portland cement-based ultra-light physical foaming foam concrete, the components and weight percentages are: general-purpose Portland cement 44.1%, C-type admixture 1.7%, foaming agent 1.1%, water-reducing agent 0.3%, Water 52.8%; Among them: the general-purpose Portland cement is 52.5 grade ordinary Portland cement, the C-type admixture is composed of sodium aluminate, calcium formate, and triethanolamine, and the foaming agent is a commercially available animal protein foaming agent. The agent is a commercially available naphthalene-based water reducer;

[0040] The preparation method is: first take general-purpose Portland cement, C-type admixture, foam agent, water reducer and water according to the weight percentage; dilute the foam agent and water at a ratio of 1:10 to form a foam agent solution. Mechanically stir and foam to obtain foam; dissolve water reducer and C-type admixture into the remaining water of the foam preparation to obtain mixture 2; add mixture 2 to cement and stir to form a uniform slurry, add foam, stir evenly and pour directly Put it into the mold and form it. After forming, it will be demolded after 72 hours of curing with the mold. After demoulding, it will be cured for 28 days to obtain ultra-light foamed concrete.

[0041] The apparent density of the general-purpose Portland cement-based ultra-light physical foaming foam concrete that this embodiment makes is 85.0kg/m 3 , the thermal conductivity is 0.043W/(m·k), and the 28-day compressive strength is 0.11MPa

Example Embodiment

[0042] Example 3:

[0043] A general-purpose Portland cement-based ultra-light physical foaming foam concrete, the components and weight percentages are: general-purpose Portland cement 53.0%, C-type admixture 2.1%, foaming agent 0.4%, water reducing agent 0.3%, , Water: 44.2%; Among them: the general-purpose Portland cement is 42.5 grade slag Portland cement, the C-type admixture is composed of sodium aluminate, ferric nitrate, and potassium carbonate, and the foaming agent is a commercially available vegetable protein foaming agent. The water reducer is a commercially available naphthalene-based water reducer;

[0044] The preparation method is: first take the general-purpose Portland cement, C-type admixture, foam agent, water reducer and water according to the weight percentage; dilute the foam agent and water at a ratio of 1:15 to form a foam agent solution. Mechanically stir and foam to obtain foam; dissolve water reducer and C-type admixture into the remaining water of the foam preparation to obtain mixture 2; add mixture 2 to cement and stir to form a uniform slurry, add foam, stir evenly and pour directly Put it into the mold and form it. After forming, it will be demolded after 72 hours of curing with the mold. After demoulding, it will be cured for 28 days to obtain ultra-light foamed concrete.

[0045] The apparent density of the general-purpose portland cement based ultra-light physical foaming foam concrete that this embodiment makes is 268.0kg/m 3 , the thermal conductivity is 0.061W/(m·k), and the 28-day compressive strength is 0.68MPa.

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PUM

Property	Measurement	Unit
Apparent density	175.0	kg/m³
Thermal conductivity	0.0516	W/k/m
Compressive strength	0.33	mPa
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Reduce resource consumption
Reduce raw material usage

General purpose Portland cement based ultra-light physical foamed concrete

A Portland cement and foam concrete technology, applied in the field of concrete, can solve problems such as lack of resources, quality disputes, uneven quality, etc., and achieve the effects of reducing costs, reducing resource consumption, and reducing the use of raw materials

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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