CN109592941B

CN109592941B - A production process for pouring foam concrete into hollow bricks

Info

Publication number: CN109592941B
Application number: CN201910027753.4A
Authority: CN
Inventors: 汪立波; 彭学明
Original assignee: Chongqing Yueyuan Architectural Energy Saving Material Co ltd
Current assignee: Chongqing Yueyuan Architectural Energy Saving Material Co ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2021-09-24
Anticipated expiration: 2039-01-11
Also published as: CN109592941A

Abstract

本发明属于自保温砌块制备技术领域，具体涉及一种往空心砖中灌注泡沫混凝土的生产工艺。本发明采用的方案是：在传统泡沫混凝土保温材料中加入带刺果壳碎和空心微珠构成的特殊结构来提升抗压强度和保温效果，在保温、节能的同时保证砖体的强度和砖体与灌注材料的结合牢固度，而且能减少发泡剂的使用以提高经济效益，还可以在满足高效生产的同时规避速凝剂带来的后期强度下降和碱度过高的问题。The invention belongs to the technical field of self-insulation block preparation, and particularly relates to a production process for pouring foam concrete into hollow bricks. The scheme adopted by the present invention is: adding a special structure composed of thorny nut shell fragments and hollow microbeads to the traditional foam concrete thermal insulation material to improve the compressive strength and thermal insulation effect, and ensure the strength of the brick body and the brick body while maintaining thermal insulation and energy saving. The combination with the pouring material is firm, and the use of foaming agents can be reduced to improve economic benefits. It can also avoid the problems of later strength decline and excessive alkalinity caused by quick-setting agents while satisfying high-efficiency production.

Description

Production process for pouring foam concrete into hollow brick

Technical Field

The invention belongs to the technical field of self-insulation building block preparation, and particularly relates to a production process for pouring foam concrete into a hollow brick.

Background

The hollow brick has the advantages of light weight, convenience in construction and raw material saving, the foam concrete has the effects of noise reduction and heat insulation as a novel building material, and based on the market demand and social demand of heat preservation and energy conservation, technicians in the building industry combine the foam concrete and the hollow brick to fill the foam concrete into the hollow brick, so that the self-heat-preservation building block is produced at the end of the year, and is widely concerned and widely applied.

However, in the prior art, the hollow brick poured with the common foam concrete has many defects, such as poor bonding property between the foam concrete and the brick body, difficulty in taking the thermal insulation property and the brick body strength into consideration, easiness in collapse of the foam concrete, and the like, and the foam concrete is limited by the price of a foaming agent, so that the foaming effect is not ideal in practical use.

Therefore, the technical field of self-insulation building block preparation is in urgent need of a self-insulation building block with excellent comprehensive performance, which can ensure the strength of a brick body and the bonding firmness of the brick body and a pouring material while preserving heat and saving energy, can reduce the use of a foaming agent to improve economic benefits, and can meet the requirement of high-efficiency production and avoid the problems caused by an accelerator. Therefore, the invention provides a brand-new production process for pouring the heat-insulating material into the hollow brick, which has practical significance and application value.

Disclosure of Invention

One of the purposes of the invention is to provide a heat insulation material which is convenient in material obtaining, low in cost, high in economic benefit and excellent in comprehensive performance.

In order to realize the purpose, the invention adopts the following technical scheme:

an insulation material, the insulation material comprising: broken spiny fruit shells, hollow microspheres, a foaming agent, a gelling agent, an accelerating agent and an expanding agent.

Further, the heat insulation material comprises the following components in parts by mass: 10-16 parts of chopped spiny fruit shells, 0.8-1.2 parts of hollow microspheres, 0.4-0.8 part of foaming agent, 30-40 parts of water, 80-100 parts of gelling agent, 0.2-0.4 part of accelerating agent and 5-9 parts of expanding agent.

Further, the raw materials of the chopped spiny fruit shells are one or more of castor shells, chestnut shells and cocklebur shells, and the particle size of the chopped spiny fruit shells is 4-16 mm; and/or; the hollow micro-bead is prepared from one or more of hollow glass micro-beads, hollow ceramic micro-beads and hollow vitrified micro-beads as raw materials, and the particle size of the hollow micro-bead is 12-32 mu m.

Further, the grain size of the fruit shell pieces with the thorn is 4-10 mm; and/or; the particle size of the hollow microspheres is 22-32 mu m.

Further, the foaming agent is one or more of sodium dodecyl benzene sulfonate, sodium alkyl sulfonate and polyethylene glycol;

and/or; the gelling agent is one or more of cement, fly ash and volcanic ash;

and/or; the accelerating agent is one or more of aluminum oxide clinker-carbonate accelerating agent, aluminum oxide clinker-alunite accelerating agent and water glass accelerating agent;

and/or; the expanding agent is one or more of montmorillonite, kaolinite and perlite.

Further, the gelling agent is ordinary portland cement; and/or; the expanding agent is perlite.

The second purpose of the invention is to provide an application of the thermal insulation material for realizing the first purpose of the invention in a hollow brick.

the heat insulating material in the technical scheme adopted for achieving the purpose of the invention is applied to the holes of the hollow brick so as to obtain the hollow brick which is filled with the heat insulating material and has good heat insulating effect, high compressive strength, good filling property and firm bonding, and the hollow brick comprises at least one hole which penetrates through the opposite side surfaces of the brick body and is used for containing the heat insulating material.

The heat-insulating material can also be used as a heat-insulating coating to be coated on the outer surfaces of building blocks such as hollow bricks and the like so as to obtain a heat-insulating coating with good adhesion and heat insulation.

The invention also aims to provide a production process for pouring the heat-insulating material into the hollow brick, which has good filling property of the heat-insulating material and is firmly bonded with the heat-insulating brick holes.

a production process for pouring a heat insulation material into a hollow brick comprises the following steps:

a. preparing a sintered or non-sintered hollow brick, wherein the hollow brick comprises at least one hole penetrating through the opposite side surfaces of a brick body;

b. fully mixing broken fruit shells with the thorn and the hollow microspheres to obtain light aggregate;

c. introducing a foaming agent into air under the mechanical action to prepare foam;

d. uniformly mixing water, a gelling agent and an accelerating agent to obtain slurry;

e. stirring the lightweight aggregate, the foam and the slurry together to obtain an initial product;

f. adding an expanding agent into the initial product and then continuously stirring to obtain a final product, namely a heat-insulating material;

g. and pouring the heat-insulating material into the holes of the hollow brick until the heat-insulating material is flush with the end face where the brick holes are located.

Furthermore, the hollow brick is formed by pressing one or more of shale, clay and coal gangue serving as main raw materials through a mould;

and/or; the heat insulation material comprises the following components: broken spiny fruit shells, hollow microspheres, a foaming agent, a gelling agent, an accelerating agent and an expanding agent.

The invention has the following beneficial effects:

1. the most outstanding and unique beneficial effects are as follows: broken and hollow microballon of thorn shell acts as the light aggregate in the insulation material after intensive mixing, the broken and having a large amount of clearances of thorn shell, protruding thorn structure, hollow microballon has hollow closed space and material density itself is little, high strength, thermal-insulated and fall and make an uproar, and hollow microballon can get into, imbed the broken hole of thorn shell, in the gap, the structure similar to "clearance solid solution" has been formed, the two complements each other, the broken and constraint effect of thorn shell is played hollow microballon and is avoided its flowing everywhere in the insulation material, hollow microballon has promoted the garrulous intensity of thorn shell again in reverse, they regard as a whole equipartition in insulation material, the intensity of the brick body has been showing and promoted.

2. The shell pieces with the thorn and the hollow microspheres have self-contained gaps or hollow structures, a large amount of micro bubbles or even vacuum environment is introduced into the heat insulation material, the micro pores are enriched, the heat insulation effect is ensured, meanwhile, the use of expensive foaming agents is reduced by introducing self pores, the problem of collapse caused by the foaming agents is obviously improved, and the economic benefit of the heat insulation building block is improved.

3. The area thorn shell is garrulous to have the hole, the intermediate layer, the spine, branching isotructure, can hang or clip the small arch of brick body hole inner wall, sunk structure, can also improve the frictional force between insulation material and the brick body, the combination firmness of insulation material with the brick body has been improved, the area thorn shell is garrulous to extend in the thick liquids in addition, alternate, the thick liquids connection of different positions is in the same place, through reducing the mobility promotion its solidification of filling back insulation material, the use that has showing and reduced the accelerator, the problem that later stage intensity is low and the basicity is too high is showing to be improved.

4. The expanding agent is used in the heat-insulating material, the volume expands after absorbing moisture, the problem of later strength reduction caused by the use of the accelerating agent can be effectively solved by adjusting the water-cement ratio, the problem of foam concrete collapse can be effectively solved by volume expansion, and in addition, the problem of overhigh alkalinity caused by the accelerating agent can be solved by using the weak-acid expanding agent.

5. The raw materials such as broken spiny fruit shells and hollow microspheres are wide in source and low in price, the use amount of expensive products such as foaming agents and accelerating agents is greatly reduced while the process effect is guaranteed, the economic benefit of the product is improved, the application and popularization of the self-insulation building block product are facilitated, the problems caused by the foaming agents and the accelerating agents are avoided through the improvement of the structure and the formula, and the comprehensive quality of the product is improved.

Detailed Description

In order to obtain better filling effect, a further embodiment of step g is: the nozzle of the filling device firstly extends into the hole bottom of the hollow brick and then gradually moves towards the orifice while filling. By the operation, the heat insulation material can be uniformly filled in the brick holes of the hollow bricks, and the problem that the brick holes are internally provided with air cavities due to direct filling from the top is avoided.

and/or; the gelling agent is one or more of cement, fly ash and volcanic ash;

In order to reduce the production cost and obtain better comprehensive performance, the invention can further select the following materials: the gelatinizing agent is ordinary portland cement and the expanding agent is perlite. The advantage of the operation is that because the special structure formed by the broken fruit shells with the thorn and the hollow microspheres is adopted to improve the compressive strength and the heat preservation effect, and the use of the foaming agent is reduced, the special cement which is more adaptive to the foaming agent but is more expensive is not needed, and the common portland cement can realize the excellent comprehensive performance of heat preservation and strength. A small amount of accelerator added into the heat-insulating material still causes the problem of higher alkalinity, and the perlite is weakly acidic and can neutralize the alkalinity, so that the influence on the use safety and the service life of the heat-insulating brick due to overhigh alkalinity is avoided.

The technical solutions of the present invention are described clearly and completely by the following embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments of the present invention, fall within the scope of protection of the present invention.

Examples

1. By using the steps of the production process for pouring the heat insulation material into the hollow brick, 30 groups of hollow brick samples poured with the heat insulation materials with different formulas are produced, each group of samples comprises at least six bricks, wherein the 28 th group, the 29 th group and the 30 th group are blank control groups.

The experimental starting materials for each example are commercially available: the hollow brick is a sintered brick taking shale as a main raw material, the broken raw material with thorn shells is a chestnut shell, the raw material of hollow microspheres is hollow glass microspheres, the foaming agent is sodium dodecyl benzene sulfonate, the gelling agent is cement, and the accelerating agent is an aluminum oxide clinker-carbonate accelerating agent.

The specific formulation of the insulation material of each example is shown in table 1.

TABLE 1 specific formulation of insulating material in each example

The experimental methods in the above examples are all conventional methods unless otherwise specified, and the quantitative tests in the examples are all set as three replicates, and the data are the average value or the average value ± standard deviation of the three replicates.

2. And (3) carrying out test measurement on each group of samples, and obtaining and recording the data of the thermal conductivity lambda, the 3d (three days) collapse depth, the 28d (twenty-eight days) compressive strength, the bonding strength and the alkalinity of the heat-insulating material of each group of samples in a table. Wherein:

the thermal conductivity lambda is directly measured by a thermal conductivity coefficient measuring instrument, the average value of six bricks in each group is taken, and the measurement result is accurate to thousandth;

the 3d slump depth refers to the maximum value of the distance between the concave surface formed by the heat-insulating material at the brick hole and the end surface of the brick hole after three days of pouring, the maximum value is measured by a digital display height gauge for at least three times, at least ten measuring points are taken each time, the average value of the maximum values measured for three times is taken as the final slump depth value of the sample brick, the average value of six bricks is taken in each group, and the measuring result is accurate to the percentile;

the 28d compressive strength refers to the overall compressive strength of the hollow brick after the hollow brick is filled with the heat-insulating material and maintained for twenty-eight days under the same condition, the measuring equipment adopts a common hydraulic press to measure the pressure for damage, the pressure is calculated, the maximum value is taken as a result value, the average value of three bricks is taken for each group, and the measuring result is accurate to ten minutes;

the bonding fastness refers to that a heat-insulating material is poured into the hollow brick and finally set, after the hollow brick is maintained under the same condition for the same time, the overall bonding performance between the heat-insulating material in the brick hole of the hollow brick and the inner wall of the brick hole is determined, the determination equipment adopts a common hydraulic press to fix the brick body of the hollow brick, the pressure for ejecting the heat-insulating material out of the brick hole is determined, the pressure is calculated, the maximum value is taken as the result value of the reaction bonding fastness performance, the average value of the other three bricks is taken for each group, and the measurement result is accurate to the percentile;

the alkalinity of the heat-insulating material refers to that after the heat-insulating material is finally solidified, equal parts of the heat-insulating material of each sample are respectively taken and stirred in equal water, the sample is kept still, the supernatant is taken, the alkalinity of the supernatant is measured by using a precise pH test paper, the average value of six bricks is taken in each group, and the measurement result is accurate to ten minutes.

The test results of the samples of each example are shown in Table 2.

TABLE 2 test results of the samples of the examples

Claims

1. a production technique of pouring thermal insulation material into hollow brick, is characterized in that, comprises the following steps:

a. Preparation of sintered or non-sintered hollow bricks, the hollow bricks containing at least one hole penetrating opposite sides of the brick body;

b. Fully mix the prickly nut shells and hollow microbeads to obtain light aggregates;

c. Introduce the foaming agent into the air under mechanical action to obtain foam;

d. Mix water, gelling agent and accelerator to obtain slurry evenly;

e. stirring the light aggregate, foam and slurry together to obtain a primary product;

f. After adding the expansion agent to the initial product, continue stirring to obtain the final product, that is, the thermal insulation material;

g. pouring the thermal insulation material into the hole of the hollow brick until the thermal insulation material is flush with the end face where the brick hole is located;

In terms of parts by mass, the material components of the thermal insulation material are: 10-16 parts of prickly nut shells, 0.8-1.2 parts of hollow microbeads, 0.4-0.8 parts of foaming agent, and 30 parts of water. ~40 parts, 80-100 parts of gelling agent, 0.2-0.4 part of quick-setting agent, and 5-9 parts of swelling agent; the gelling agent is cement; the raw material of the prickly nut shell crushed is castor oil One or more of shells, chestnut shells, and cocklebur shells, the particle size of the prickly nut shell fragments is 4-16 mm; the raw materials of the hollow microbeads are hollow glass microbeads, hollow ceramic microbeads, hollow glass microbeads One or more of the hollow microbeads, the particle size of the hollow microbeads is 12-32 μm.

2. a kind of production technique of pouring thermal insulation material into hollow bricks according to claim 1, is characterized in that: described hollow bricks take one or more of shale, clay, coal gangue as main raw material through mould pressing and produce. completed.

3. A thermal insulation material, characterized in that: the thermal insulation material, in parts by mass, comprises the following components: 10 to 16 parts of prickly nut shell fragments, 0.8 to 1.2 parts of hollow microbeads, and a foaming agent. 0.4 to 0.8 parts, 30 to 40 parts of water, 80 to 100 parts of a gelling agent, 0.2 to 0.4 parts of a quick-setting agent, and 5 to 9 parts of an expansion agent; the gelling agent is cement; The raw material of the prickly nut shell fragments is one or more of castor shells, chestnut shells, and cocklebur shells, and the particle size of the prickly nut shell fragments is 4-16 mm; the raw material of the hollow microbeads is hollow One or more of glass microbeads, hollow ceramic microbeads, and hollow vitrified microbeads, wherein the particle size of the hollow microbeads is 12-32 μm.

4 . The thermal insulation material according to claim 3 , wherein the particle size of the prickly nut shell fragments is 4-10 mm; the particle size of the hollow microbeads is 22-32 μm. 5 .

5. The thermal insulation material according to claim 3, wherein the foaming agent is one or both of sodium dodecylbenzenesulfonate and sodium alkylsulfonate;

And/or; Described quick-setting agent is one or more in aluminum-oxygen clinker-carbonate-based quick-setting agent, aluminum-oxygen clinker-alumite-based quick-setting agent, and water glass-based quick-setting agent;

and/or; the swelling agent is one or both of montmorillonite and kaolinite.

6 . The thermal insulation material according to claim 5 , wherein the gelling agent is ordinary Portland cement. 7 .

7. Application of the heat insulating material according to any one of claims 3 to 6 in hollow bricks.