SE466498B - QUICK-BINDING MULTI-COMPONENT MASS, SET FOR ITS PREPARATION AND APPLICATION OF THEM - Google Patents

Description

466 498 those marketed under the "LECA" brand) on the ground inside the foundation wall formed by the blocks, after which a layer consisting of reinforced concrete is cast directly on top of the clay ball bed. The concrete surface thus obtained is, however, to be regarded as the surface of a conventional concrete floor or subfloor, which must therefore be moisture-cured at least 7 days. A concrete wear layer can be laid on the said surface or it can be the same after the required moisture curing coated with a leveling compound or a float putty of the type described in U.S. Pat 3 972 723.

In recent times, it has mainly in housing and office buildings started manufacturing flooring during use of cooperative plate type "PEVA 45", which is based on a Finnish invention. Said plate construction acts as a retaining form of the floor at the same time as its profile is designed to form bottom edge reinforcement. Formwork and reinforcement thus takes place in one step. The concrete used however, the pulp is in terms of quality and strength similar to that used in traditional reinforced floors and consequently has the same moisture curing requirement.

The finished concrete in the floors used so far has a bulk density of between 2.35 and 2.45 kg / dm3, which makes that each floor in a building has a significant specific gravity, which in turn affects the construction of the building. When using However, the use of a cooperating plate type "PEVA 45" enables the plate profile a concrete saving, sonx reduces the floor weight with almost 50 kg per m2, but total dead weight per floor is still significant.

Disclosure of the invention Technical problem A major disadvantage of all known and hitherto used, cast-in-place floors and concrete floors are the long time, required for moisture curing and drying, before is possible to start coating or other treatment.

Thus, for example, for a concrete floor (sub- U.N. rr 466 498, floor) and a concrete casting layer thereon at least 7 plus at least 14 days of moisture curing, ie a total of at least 21 days moisture curing. Cast the floor and wear layer in succession, you can cope with at least 14 days of moisture curing already, however, a considerable time. In addition, in both fallen dehydration to a moisture content, which is 'below' the limit value for the type of coating in question.

(The limit values for different coatings are shown in Table Q2 and HusAMA). The time required for drying of one certain floor area to acceptable moisture content, varies' with those conditions prevailing, ie with the ambient air moisture content and temperature and its turnover. The usually lasts for several days and at unfavorable conditions in weeks.

Another disadvantage of traditional floors on the ground and flooring is that they often need thermal insulation, whereby the insulation must be laid under or on top of the concrete layer alternatively in the case of several layers of concrete. This entails increased construction height and extra working hours with accompanying higher cost. In addition, when the concrete is cast in class A, a concrete layer lying on top of insulation always reinforced, which of course increases the cost even more.

Especially in the case of conversions and repairs of water damage, etc., they create long and often unpredictable moisture-curing drying and drying times today many practical problems both in the planning and in the execution of such work, which all must be included among the disadvantages of it known technology. The object of the present invention is to solve the above problems as well as eliminate those with the prior art associated the shortcomings and disadvantages of developing a mass for the manufacture of floors and floors, which has compared to so far used lots improved properties, especially with respect to volume weight, core and drying time, thermal insulation as well as shrinkage and elasticity. 466 498 Solution Multicomponent compositions according to the present invention solves the problems described above and eliminates the shortcomings and disadvantages, such as the application of prior art entails. Accordingly, the present invention relates to a fast-binding multi-component compound with a short drying time for manufacture of shrink-free floors and low-volume floors weight, good heat and sound insulating properties and some elasticity. The multicomponent mass is characterized by, that it consists of the following components: (a) 30-70% by weight of grains of expanded, fired clay; with grain size 12-20 mm b) 10-40% by weight fast-binding, polymer-modified and hydraulic cement based mortar c) 20-40% by weight fast-binding and on hydraulic cement based, fiber reinforced mortar.

Preferably the grains consist of expanded fired clay of such grains, which are marketed under one of the brands "LECA" or "FIBO".

Particularly appropriate has further proved to be, if so polymer-modified, cement-based mill consists of such mill, which is marketed by Svenska ICI AB under the brand name "STRUCTURITE" * and about the cement-based, fiber-reinforced the mill consists of such a mill that is marketed, likewise by Svenska ICA AB, under the trademark "ROADPATCH" *.

The invention also encompasses a method of making the multicomponent mass in question, which is characterized by: a) that they expanded, burned and usually spherical the clay grains are premixed with a PVA-based binder in such a way that the surface of each grain gets one adhesive and adhesive coatings of the adhesive in question, after which excess binder may drain from the grains while allowing them to dry b) that 2 parts by weight of the clay cores pretreated according to "a" is mixed with 1 part by weight of the fast-binding *) Both STRUCTURITE and ROADPATCH are registered trademarks and belongs to the group THORO products marketed in Sweden by Svenska ICA AB. yo 466 498 polymer-modified, cement-based mill, which reinforced with about 4% by volume of PVA-based binder part, and which has been given a suitable use consistency by mixing with a liquid consisting of equal parts water and an acrylic polymer in liquid form, to be able to be shaped and packed into a first pulp layer of desired thickness with smooth surface in it floors or floors to be manufactured, and c) that the first pulp layer produced according to "b" as a surface reinforcement is provided with a layer of it fast-binding cement-based, fiber-reinforced mill mixed with water to such a consistency, that when spread under pressure, it is able to penetrate between the clay grains in the first pulp layer to a depth of about 10 to 15 mm and that can be made to form a smooth surface in the desired roughness by board tearing or steel smoothing.

The drying time of the first pulp produced according to "b" the layer is about 10 hours at room temperature. If faster drying and curing of this layer is desired, can this is achieved by increasing the polymer modified, the cement-based mill's share in the mixture.

The surface reinforcement layer prepared according to "c" above is ready for further treatment after about 1 hour, such as fine putty or float putty for carpet laying ect.

Benefits When using multicomponent pulp according to the invention for the manufacture of floors and floors, this contributes through its low volume weight greatly to keep the dead weight of said constructions down. This in turn allows that foundation and load-bearing structural parts, such as walls etc can be made with smaller dimensions, which results in an overall easier and less costly demanding building.

Multicomponent pulp according to the invention is further through compared to traditional concrete structures, 466 498 low weight labor saving - a not insignificant advantage, when it comes to keeping construction costs so low as possible.

Another significant advantage is the short bonding, curing and drying times, as the multicomponent pulp according to the invention has. Thus, the first pulp layer has a drying time at room temperature of about 10 hours. Surface reinforcement the curing layer is completely cured after only about 15 minutes and it can be walked on after about 1 hour, when it exhibits a compressive strength of around 100 kp / cmz. The differences against conventional concrete are thus highly significant with given that this at best requires at least '7 days moisture curing before drying can begin.

The multicomponent mass is furthermore shrink-free, which is an extremely valuable property, not least when it applies to floors and floors in buildings. In addition, the component mass is not 100% rigid, but has some elasticity.

The advantages also include that the multicomponent mass is in itself heat insulating and to a not insignificant degree soundproofing. Construction height-increasing extra insulation of floors and floors therefore do not normally need to be constructed.

An additional advantage is that the multicomponent mass when used for conversions and repairs of water damage dor and the like due to their low weight and their short binding and drying times enable the work. can be performed unusually fast and smooth.

Multicomponent pulp according to the invention has been found very well suited for building floors on profiled cooperating plate type "PEVA 45" *. The low weight of the mass in combination with the low weight of the mold plate and its profiled design which enables a pulp saving of 19 dm3 per m2 and makes bottom edge reinforcement unnecessary, giving a finished floor with unmatched low dead weight. Working time the need from formwork to finished flooring should also be almost unbeatable short.

*) Profiled and galvanized reinforcement plate marketed under the brand PEVA 45 by Svenska Byggplåt AB. n. 466 498 To further illustrate and explain the invention one of the experiments performed with the present ande multicomponent mass.

Example In the manufacture of test floor slabs with the approximate dimensions 55x35x10 cm the following components were used in the quantities given below: Weight parts 1. Grains of expanded, fired clay, (marketed - under the trademark LECA) grain size 12 - 20 mm 40 2. Fast-binding polymer-modified, cement-based use STRUCTURITE * 20 3. Fast-binding fiber-reinforced, cement-based mortar ROADPATCH * 30 4. PVA-based adhesive THOROBOND * 5. Acrylic polymer ACRYL 60 * 6. Water Components 1, 2,4,5 and 6 were treated and mixed according to the method of claims Sa) and b). The obtained the mass was spread and then packed in experimental molds to an approximately 9 cm thick first mass layer whose surface was smoothed to.

Component 3 was then mixed with water to the appropriate consistency and spread under pressure on the first masses the layers of the molds according to the method of claim 5c). They thereby obtained surface reinforcement layers became about 2 cm thick. and its surfaces were smoothed by steel smoothing.

The weight of the 10 cm thick finished and dried tiles was about 15 kg, which gives a volume weight of about 0.8 kg / dm3. A traditional concrete slab in the same dimension is thus more than 3 times heavier than those according to the invention manufactured the plates.

A contributing factor to the first pulp layer in tiles and floors made according to the invention have such a short drying time, is undoubtedly the draining and ventilating spaces, which exist between the individuals *) Products marketed in Sweden by Svenska ICI AB under the collective name THORO products. own '46e 498 So you have a ventilator which ensures that no moisture the clay grains in. this layer. insulating layer in the tiles, remains standing and impairs the insulation capacity. Self- the case also contributes to the content of mixing water, ie low vct, to the drying time is so incomparably short. low

Claims (9)

r i i i 0466 498 9 PATENT REQUIREMENTS 1. Fast-binding multicomponent compound with a short drying time for the production of shrink-free floors and floors with low volume weight, good heat and sound-insulating properties and some elasticity, characterized by the fact that it consists of 30-70% by weight of expanded, fired clay with grain size 12-20 mm, 10-40% by weight fast-binding, polymer-modified and hydraulically cement-based mortar and 20-40% by weight fast-binding and hydraulically cement-based, fiber-reinforced mortar. Multicomponent compound according to Claim 1, characterized in that the granules of expanded, fired clay consist of such granules marketed under one of the marks "LECÅ®" or "FIB63". Multicomponent compound according to Claim 1, characterized in that the polymer-modified, cement-based mortar consists of such mortar which is marketed under the "STRUCTURIT" brand. 4. A multicomponent compound according to claim 1, characterized in that the cement-based, fiber-reinforced mortar consists of such mortar which is marketed under the trademark "ROADPATC". 5. A method of producing fast-binding multicomponent pulp according to claims 1-4, characterized in that: (a) granules of expanded fired clay are premixed with a PVA-based binder so that the surface of each granule has an adhesive and gluing coating of the binder in question, after which excess binder is allowed to drain from the grains while they are allowed to dry, b) that 2 parts by weight of the clay grains pretreated according to "a" are mixed with 1 part by weight of a fast-binding polymer-modified cement-based mortar, which is reinforced with approx. 4% by volume of PVA-based binder, and which has been given suitable use consistency by mixing with a liquid consisting of equal parts of water and an acrylic polymer in liquid form in order to be able to be formed and packed into a first pulp layer of desired thickness with smooth surface, and c) that the first pulp layer produced according to "b" is provided as a surface reinforcement with a layer of a fast-binding cement-based, fiber-reinforced mortar mixed with water to such a consistency that when spread under pressure it is able to penetrate between the clay grains in the first pulp layer to a depth of about 10 to 15 mm and that it can be caused to form a smooth surface in the desired thickness by board tearing or steel smoothing. A method of producing fast-binding multicomponent pulp according to claim 5, characterized in that about 25 kg of the polymer-modified, cement-based mortar in dry form is mixed with about 3 liters of the liquid consisting of equal parts of water and acrylic polymer to obtain a suitable mortar consistency. . 7. A process for producing fast-binding multicomponent pulp according to Claims 5 to 6, characterized in that the binder used under the trademark "THOROBONé)" is used as the PVA-based binder, and that it is used as an acrylic polymer in liquid form under the brand "ACRYL 6" marketed the acrylic polymer. Use of fast-binding multi-component pulp with a short drying time for the manufacture of floors and floors in buildings, characterized in that multicomponent pulp prepared according to claim 5 a and b is spread and packed to the desired thickness with a smooth surface in a floor mold or other substrate, after which the packed and flattened surface of the pulp is surface reinforced by applying a fast-binding cement-based fiber-reinforced mortar mixed with water to a suitable consistency, which is spread under pressure so that it penetrates between the clay grains in the lower pulp layer to a depth of about 10 to 15 mm, and which is finally caused by board tearing or steel smoothing to form a smooth upper surface of the desired thickness. Use of fast-binding multi-component pulp with a short drying time for the manufacture of flooring in buildings according to claim 8, characterized in that the floor form consists of a profiled cooperating plate of the type marketed under the trademark "PEVA 4", wherein the multi-component pulp, low fast bonding as well as short drying time come in especially handy.