阅读说明：本技术 一种地暖回填工艺及专用材料及其制备方法 (A kind of floor heating backfilling process and proprietary material and preparation method thereof ) 是由 田崇霏 王再林 柴宣名 马炎 秦利攀 崔进文 李春建 李明明 郭新瑞 于 2019-09-27 设计创作，主要内容包括：本发明属于建筑材料技术领域,特别涉及一种地暖回填工艺及专用材料及其制备方法。在铺设好的地暖系统上均匀摊铺骨料球,然后将水泥基浇注料均匀浇入骨料球至骨料球被淹没,之后得到浇筑体,消除浇筑体面上的气泡后自然养护即完成地暖回填。本发明地暖回填施工工艺简单,只需简单的摊铺骨料球以及浇注水泥基浇注料后养护即可,工人劳动强度低、施工周期短,且获得的回填体平整度极高,强度高；回填体保温性能好,克服了传统地暖回填材料导热系数高、地暖热散失严重的问题。(The invention belongs to building material technical field, in particular to a kind of floor heating backfilling process and proprietary material and preparation method thereof.Uniformly pave aggregate ball on the ground heating system laid, and cement base castable is uniformly then poured into aggregate ball to aggregate ball and is submerged, and obtains pouring building body later, and floor heating backfill is completed in natural curing after eliminating the bubble poured in dignity.Floor heating of the present invention backfill construction technology is simple, conserves after aggregate ball and the casting cement base castable of only need to simply paving, and labor intensity of workers is low, short construction period, and the backfill body flatness obtained is high, and intensity is high；Body good heat insulating is backfilled, the problem that traditional floor heating backfilling material thermal coefficient is high, floor heating heat leakage is serious is overcome.)

1. a kind of floor heating backfilling process, which is characterized in that uniformly pave aggregate ball on the ground heating system laid, then by water Mud base castable uniformly pours into aggregate ball to aggregate ball and is submerged, and obtains pouring building body later, after eliminating the bubble poured in dignity Floor heating backfill is completed in natural curing.

2. floor heating backfilling process as described in claim 1, which is characterized in that uniformly pave bone on the ground heating system laid Pellet, aggregate ball is higher by floor heating pipe 0.5-2cm after paving.

3. the dedicated aggregate ball of claim 1 floor heating backfilling process, which is characterized in that the aggregate ball is from the inside to the outside respectively by ball Core, the centre of sphere, sphere, four layers of waterproof layer composition, four layers of mass ratio are ball: the centre of sphere: sphere: waterproof layer=0.1-0.3:55- 65:32-48:0.05-0.25.

4. the dedicated aggregate ball of floor heating backfilling process as claimed in claim 3, which is characterized in that aggregate ball particle gradation meets: Round-hole mesh is accumulative to tail over 31.5mm 0-5%, 20.0mm 15-45%, 10.0mm 70-90%, 5.0mm 100%.

5. the dedicated aggregate ball of floor heating backfilling process as claimed in claim 3, which is characterized in that the ball is using fine sand in matter Product after being impregnated 1-3 hours in the redispersable latex powder 2488 or 801 solution that amount concentration is 1-3%.

6. the dedicated aggregate ball of floor heating backfilling process as claimed in claim 3, which is characterized in that the centre of sphere is by bentonite, stone The mass ratio of powder composition, bentonite and mountain flour is 1.5-3:53.5-62.

7. the dedicated aggregate ball of floor heating backfilling process as claimed in claim 3, which is characterized in that the sphere is by mountain flour and 425 Ordinary portland cement composition, the mass ratio 24-36:8-12 of mountain flour and 425 ordinary portland cements.

8. the dedicated aggregate ball of floor heating backfilling process as claimed in claim 3, which is characterized in that the waterproof series of strata use quality The multifunctional nano hydrophobing agent aqueous solution that concentration is 0.5-1.5% obtains after being uniformly sprayed at spherome surface maintenance drying.

9. the preparation method of any dedicated aggregate ball of floor heating backfilling process of claim 3-8, which is characterized in that throw ball Enter the nodulizer that revolving speed is 10-20 turns/min rotation, while being uniformly added into the bentonite for being used to form the centre of sphere, mountain flour mixture, side It is uniformly added into water, after being added to centre of sphere mixture and water, speed regulation to 20-30 turns/min, rotates 2-4min；Then side is uniform The sphere of investment thereto mountain flour and 425 ordinary portland cement mixtures, while being uniformly added into water, qualified aggregate ball is in ball out Area is drawn off, and underproof raw material ball continues to discharge after balling-up is grown up to qualification；On its surface after qualified aggregate ball is conserved Uniformly sprinkling multifunctional nano hydrophobing agent continues maintenance to 28 days up to the aggregate ball；When preparing ball center layer, the matter of water addition Amount is the 14-16% of bentonite and mountain flour gross mass；When preparing sphere layer, the water of addition is 425 ordinary portland cements and mountain flour The 6-10% of gross mass.

10. claim 1 floor heating backfilling process cement base castable, which is characterized in that the mass parts of the castable form It is as follows:

425 250-350 parts of ordinary portland cements, 0.2-0.5 parts of plastic expansion agent, suspend by II grades 650-750 parts of flyash 0.2-1.0 parts of agent, 0.5-2.5 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 0.2-1.0 parts of defoaming agent, 260-300 parts of water.

Technical field

The invention belongs to building material technical field, in particular to a kind of floor heating backfilling process and proprietary material and its preparation Method.

Background technique

Currently, the backfilling material of floor heating is mainly peastone, sand, cement three parts composition, ratio substantially 3:2:1 is returned Filling out standard is C15, and backfilling process is that live stone, sand, the cement sequence of pressing presses different room area windrows from bottom to top, is then sent out The water time is not less than 30min, is manually stirred, is finally backfilled again later, there are following several for current backfilling material and technique A problem:

1, peastone, husky density are larger in backfilling material, and addition content is higher, causes the backfill volume density being made into big, thermally conductive Coefficient is high, and floor heating heat leakage is serious；2, the consistency of backfilling material is relatively high, along with stirring and backfill all by being accomplished manually, because This problem not high it is easy to appear the finished product being made into backfill body flatness, error are even up to standard water horizontal line 5mm or so.3, Backfilling material needs artificial stirring, artificial backfill, and labor intensity of workers is high, and speed of application is slow.4, in backfilling material with it is husky come There is also certain limitations in source: on the one hand, with continuing to increase for environmentally friendly dynamics, country, which adopts or limits for exploitation river sand taboo, adopts model Continuous expansion is enclosed, and hits illegal sand mining comprehensively, river sand is in short supply；On the other hand, demand gap of the capital construction in all parts of the country to river sand It is huge, cause the price of river sand to rise repeatedly.Building material industry keeps situation in check to alleviate river sand to what building materials developed, generallys use Machine-made Sand replaces river sand.But in the production and reforming process of Machine-made Sand, a large amount of mountain flour is generated, mountain flour clay content is high, matter Measure it is unstable, so the development of floor heating backfill industry is also received and being kept in check with sand source.

Summary of the invention

The object of the present invention is to provide a kind of new floor heating backfilling process, the technique overcomes tradition for peastone and sand Source limitation, while simplifying backfilling process, overcome a series of problems existing for traditional handicraft.

In order to solve the above technical problems, The technical solution adopted by the invention is as follows:

A kind of floor heating backfilling process, uniformly pave aggregate ball on the ground heating system laid, is then poured cement base Material uniformly pours into aggregate ball to aggregate ball and is submerged, and obtains pouring building body later, eliminates natural curing after the bubble poured in dignity Complete floor heating backfill.

Preferably, uniformly pave aggregate ball on the ground heating system laid, and aggregate ball is higher by floor heating pipe 0.5- after paving 2cm is preferably higher by 1cm.

Specifically, the bubble for pouring body surface face just poured can be eliminated with defoaming roller.

After defoaming, the construction that other programs can be carried out after backfilling body natural curing for 24 hours is poured.

The present invention still further provides a kind of dedicated aggregate ball of above-mentioned floor heating backfilling process, and the aggregate ball is from the inside to the outside It is made of respectively ball, the centre of sphere, sphere, four layers of waterproof layer, four layers of mass ratio is ball: the centre of sphere: sphere: waterproof layer=0.1- 0.3:55-65:32-48:0.05-0.25, preferably 0.2:60:40:0.1.

Preferably, aggregate ball particle gradation meets: round-hole mesh is accumulative to tail over 31.5mm 0-5%, 20.0mm 15-45%, 10.0mm 70-90%, 5.0mm 100%.

The ball uses fine sand in mass concentration to impregnate in the redispersable latex powder 2488 of 1-3% or 801 solution Product after 1-3 hours.

The fine sand selection meets the fine sand of 3rd area natural sand requirement in GB/T14684-2011, that is, meets square hole screen 4.75mm tails over as 0-10%, 2.36mm 0-15%, 1.18mm 0-25%, 0.60mm 16-40%, 0.30mm 55- 85%, 0.15mm 90-100%.Inventor has found that and not all fine sand may be used to prepare it is of the invention The gradation of aggregate ball, medium-fine sand has larger impact for the performance of aggregate ball.It is final obtained if ball gradation is unreasonable Aggregate ball particle gradation is unreasonable, and the bulk density of aggregate ball will become smaller, and voidage will become larger, under concrete Compressive Strength will occur substantially Drop.

More preferably, the fine sand gradation is as follows: 1.18mm tails over is for 0,0.60mm 25.4%, 0.30mm 68.4%, 0.15mm 95.3%, 0.075mm 100%.

The centre of sphere is made of bentonite, mountain flour, and the mass ratio of bentonite and mountain flour is 1.5-3:53.5-62, and preferably 2: 58。

The sphere is made of mountain flour and 425 ordinary portland cements, the mass ratio of mountain flour and 425 ordinary portland cements 24-36:8-12, preferably 3:1.

The waterproof series of strata use mass concentration to be uniformly sprayed at for the multifunctional nano hydrophobing agent aqueous solution of 0.5-1.5% It is obtained after spherome surface maintenance is dry.

The present invention is not simply using the original peastone of ball products substitution, but by aggregate ball overall structure, The number of plies including aggregate ball, ratio between layers, the selection of each layer of ingredient and configuration etc. are studied, and are finally sent out Now use structure of the invention and configuration aggregate ball, it is structurally reasonable, have excellent performance, cost it is also most economical, the aggregate ball concrete of acquisition Compressive Strength highest and material cost is lower.Wherein, outermost waterproof layer can prevent aggregate ball to the cement poured on it The moisture absorption of base castable, avoid backfill body because cement base castable dehydration cross often have local backfill face hole shape collapse it is scarce It falls into.

The present invention still further provides a kind of preparation method of dedicated aggregate ball of above-mentioned floor heating backfilling process, and ball is thrown Enter the nodulizer that revolving speed is 10-20 turns/min rotation, while being uniformly added into the bentonite for being used to form the centre of sphere, mountain flour mixture, side It is uniformly added into water, after being added to centre of sphere mixture and water, speed regulation to 20-30 turns/min, and (the specific time can by rotation 2-4min According to the centre of sphere, whether fully wrapped around ball judges)；Then side uniformly puts into sphere mountain flour and 425 normal silicates thereto Cement admixture, while being uniformly added into water, the qualified area aggregate Qiu Chuqiu is drawn off, and underproof raw material ball continues balling-up and grows up It discharges after to qualification；Multifunctional nano hydrophobing agent will be uniformly sprayed on its surface after qualified aggregate ball maintenance, continues maintenance extremely 28 days up to the aggregate ball；When preparing ball center layer, the quality that water is added is the 14-16% of bentonite and mountain flour gross mass；System When standby sphere layer, the water of addition is the 6-10% of 425 ordinary portland cements and mountain flour gross mass.

Specifically, qualified aggregate ball is conserved 7 days under conditions of 20 DEG C of temperature, humidity 90%, then again in its table Uniformly spray the hydrophobic agent solution of multifunctional nano in face.

The preparation method of aggregate ball provided by the invention cooperates the four-layer structure of aggregate ball, using layering balling-up, and leads to The cooperation for crossing the parameters such as revolving speed, balling-up time first passes through the three-decker of disk balling machine method molding from inside to outside, then passes through it He obtains waterproof layer at method, finally prepares the aggregate ball with four-layer structure, with a current general balling-up of ball product The method for generating intensity to be calcined again to compare, aggregate ball preparation of the invention generates intensity by hydrated cementitious in material without calcining, Both the waste for having avoided the energy, also simplifies preparation process.Wherein, the adjustment of revolving speed is also very crucial, revolving speed influence easy to reunite slowly Balling-up, balling ratio, revolving speed are easily centrifuged fastly, and ball, which can not roll, to be continued to grow up.

Further, the present invention also provides above-mentioned floor heating backfilling process cement base castable, the quality of the castable Part composition is as follows:

425 250-350 parts of ordinary portland cements, 0.2-0.5 parts of plastic expansion agent, hang by II grades 650-750 parts of flyash It is agent 0.2-1.0 parts, 0.5-2.5 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 0.2-1.0 parts of defoaming agent, 260-300 parts of water floating.

Preferably, the mass parts composition of the castable is as follows:

425 300 parts of ordinary portland cements, 0.3 part of plastic expansion agent, 0.5 part of suspending agent, gather by II grades 700 parts of flyash 1 part of carboxylic acid high efficiency water reducing agent, 0.5 part of defoaming agent, 280 parts of water.

Specifically, obtaining dry blend in use, first mixing other raw materials in addition to water, adds water and be sufficiently stirred Uniformly obtain cement base castable.

To sum up, compared with the prior art, the invention has the following advantages:

1, the aggregate ball gradation that the present invention obtains is reasonable, light, and intensity is high, and water absorption rate is extremely low；

2, the comprehensive mountain flour addition content of aggregate ball accounts for the 87.7% of ball quality, can be recycled using solid waste mountain flour, make material Expect it is at low cost, aggregate ball finished product price be lower than stone, wide market；

3, floor heating backfill construction technology of the present invention is simple, and only need to simply pave aggregate ball and casting cement base castable It conserves afterwards, labor intensity of workers is low, short construction period, and the backfill body flatness obtained is high, and≤2mm/3m is much super GB50209 " building ground engineering construction quality acceptance specification " requirement is crossed, intensity can reach 23.6MPa.

4, it is only 0.38W/m.K through measurement backfill body thermal coefficient, backfills body good heat insulating, overcome traditional floor heating and return Fill out the problem that material thermal conductivity is high, floor heating heat leakage is serious.

Detailed description of the invention

Fig. 1 is that the ground heating system laid in embodiment 1 waits the photo of backfill；

Fig. 2 is the photo after paving aggregate ball in 1 step A of embodiment；

Fig. 3 is the photo that 1 step B of embodiment pours into cement base castable；

Fig. 4 is that 1 step C of embodiment defoaming roller elimination pours the photo after body blibbing；

Fig. 5 is the photo for completing floor heating backfill in 1 step D of embodiment after natural curing for 24 hours；

Fig. 6 is the structural schematic diagram (not pressing actual ratio) of the dedicated aggregate ball of floor heating backfilling process of the invention, wherein 1 is Ball, 2 be the centre of sphere, and 3 be sphere, and 4 be waterproof layer；

Fig. 7 is the structural schematic diagram (not pressing actual ratio) of the dedicated aggregate ball of 2 floor heating backfilling process of embodiment, wherein 1 is Ball, 2 be the centre of sphere, and 3 be sphere；

Fig. 8 is the photo that floor heating backfill is completed in 2 step D natural curing of embodiment afterwards for 24 hours.

Specific embodiment

Below the technical scheme of the invention is illustrated by a specific example, but the scope of the present invention is not limited thereto:

Multifunctional nano hydrophobing agent in following embodiment usesB1490, plastic expansion agent use sulphur aluminium Sour calcium-calcium oxide expansion agents AC, suspending agent use the BJ-908A of Shanghai north monarch's Chemical Manufacture, and high-efficiency water-reducing agent of poly-carboxylic acid makes With F1, defoaming agent uses P803.