Special gelation material for inorganic foamed concrete
An inorganic foaming and concrete technology, which is applied in the field of cement, can solve the problems of long curing time, unguaranteed product quality, and low output, and achieve the effects of stable performance, balanced development of strength, and good crack resistance
Inactive Publication Date: 2014-11-19
LIAONING MOLITE NEW BUILDING MATERIALS
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Problems solved by technology
This brings about two problems. The first is that ordinary Portland cement is a general-purpose cement, which is used in a large amount and in a wide range. However, the ratio of cement manufacturers varies greatly, and the product quality cannot be guaranteed. The result is often foamed concrete in the previous stage. If the quality is up to standard, the mold may collapse or fail to be shipped in the next stage.
Secondly, due to the characteristics of ordinary Portland cement, the demolition time is long (24 hours) and the curing time is longer (28 days).
Although the quick-hardening sulfoaluminate cement has a short form removal and maintenance time, the foamed concrete products produced by it have poor durability and low strength in the later stage, and because it is a special cement, the output is low and there are few manufacturers, so the cost of the product is high. Long distance, difficult to obtain
The situation is more complicated when the two kinds of cement are used together, and the problems of durability and form removal and curing time have not been completely resolved
Method used
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[0017] It is made of high-grade (more than 62.5MPa) clinker, silica fume, fast-hardening sulphoaluminate cement, G-grade natural dihydrate gypsum, grinding aids, rubber powder and composite early strength agent, mixed by ultrafine grinding composition; said superfine grinding refers to
[0018]
[0019] The weight percentages of the above components are: 86.7 for high-grade clinker, 5.0 for silica fume, 2.0 for rapid hardening sulfoaluminate cement, 1.0 for grinding aid, 4.0 for G-grade natural dihydrate gypsum, and 0.3 for rubber powder , the composite accelerator is 1.0;
[0020] The requirements for each of the above components are:
[0021] Clinker: tricalcium silicate ≥ 55% before grinding, tricalcium aluminate ≥ 8.5%, free calcium oxide ≤ 1.0%, compressive strength 3d ≥ 32.0MPa, 28d ≥ 62.5 MPa;
[0022] Silica fume: loss on ignition ≤ 6.0%, chloride ions ≤ 0.02%, silica ≥ 85%, specific surface area ≥ 15000m 2 / kg, moisture content ≤ 3.0%;
[0023] Rapid hardening ...
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Abstract
The invention provides a special gelation material for an inorganic foamed concrete, and the special gelation material aims to solve the problems that the general cement product quality cannot be ensured; and secondarily, the stripping time is long, and the maintenance time is longer. The special gelation material has the key points that the special gelation material is prepared by superfine grinding and mixing 86.7% of clinker with high strength grading, 5% of silica fume, 2% of rapid hardening sulphate aluminium cement, 4% of G-level natural dehydrate gypsum, 1% of grinding additive, 0.3% of gelatine powder and 1% of complex accelerator. The special gelation material has the active effects of high early strength, good crack resistance, short coagulation time, later strength balance development, stability in various performances and the like; and the cellular concrete produced by the special gelation material has high strength and low thermal conductivity coefficient.
Description
technical field [0001] The invention relates to cement, in particular to a special gelling material for inorganic foamed concrete. Background technique [0002] Foam concrete insulation board is made of siliceous material, calcium material, supplemented with masterbatch, water reducing agent, reinforcing fiber, water and foaming agent or foaming agent, through chemical foaming or physical foaming, through uniform stirring , pouring molding, natural or high temperature curing, cut into specifications and sizes, and become a porous concrete insulation material for thermal insulation in construction projects. As an inorganic thermal insulation material, foam concrete has the characteristics of light weight, good thermal insulation, excellent fire resistance, and no pollution to the environment. It has been widely used in construction projects in our country. Among the raw materials of foam concrete, cement binder accounts for more than 98%. The cement currently used in foam c...
Claims
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IPC IPC(8): C04B28/06
Inventor 仇文革于滢王书江曲凤贤黄梅
Owner LIAONING MOLITE NEW BUILDING MATERIALS