KR20120021487A - A construction working method of concrete containing urethane form - Google Patents

Abstract

PURPOSE: A construction method of concrete using urethane Styrofoam as a main component is provided to effectively recycle waste urethane foam or waste Styrofoam and prevent dust generation. CONSTITUTION: A construction method of concrete using urethane Styrofoam as a main component comprises the following steps: preparing shattered waste urethane foam, waste Styrofoam, or urethane pole; respectively calculating volume ratio of the waste urethane foam, the waste Styrofoam, and the urethane pole as 50-80%, 19.9-40%, and 0.1-4%; loading the waste urethane foam, the waste Styrofoam, or the urethane pole, and admixture in order to dry mix; mixing the cement with water and manufacturing paste; loading the paste in lemicon car while mixing the mixture; transferring to field to construct. In the preparing step, the waste urethane foam and waste Styrofoam are mixed in weight ratio of 5-7 to 1-3.

Description

A construction working method of concrete containing urethane form

The present invention relates to a construction method of concrete, and relates to a construction method of concrete mainly composed of urethane poles in which waste urethane foam and waste styropole are mixed without using sand.

In general, in order to construct concrete used in concrete buildings, aggregate aggregates such as cement, gravel, and sand are piled up in an outdoor loading dock, and water, cement, and aggregate are mixed and mounted in ready-mixed concrete cars, and mixed during operation of the vehicle, and used in the field. Done. Or to secure an empty lot around the site and go through the same process as above, in this case, if the site is far away, problems such as excessive costs will occur.In order to place cement around the site, an empty lot must be secured. In addition, the generation of dust around the dripping of gravel and sand has always been a problem of civil complaints.

In order to solve the above problems, as well as reducing the use of sand as well as a method of constructing urethane poles on site by using a waste urethane foam or styropol has been disclosed in the patent application No. 10-391558, but also sand Not all of the problems of the prior art, such as must be used.

The present invention thus solves the problems of the prior art as described above, and can effectively reuse the waste urethane foam or styropol to be discarded while effectively preventing dust generation, such as using sand, construction of concrete with a urethane pole as a main component The purpose is to provide a method.

The present invention to achieve the object of the present invention as described above;

Pulverized waste urethane foam or waste styropol or a urethane pole mixed with them, and the pulverized urethane foam or styropol or urethane pole mixed with these mixtures and cement in a volume ratio of 50 to 80% urethane pole, 0.1 to 4 admixture % And cement 19.9 to 40% after quantitative calculation, the quantitative urethane poles and admixtures were mounted in a ready-mixed tea, and mixed with the quantitatively calculated cement and water, prepared in the paste state The present invention provides a method for constructing concrete containing urethane poles, which is mounted on a car, transported to a site while being fed to the mortar pumping machine, and the contents of the ready-mixed concrete are fed into the site after being pressed and poured.

The paste state in which the cement and water are mixed may be prepared separately, or may be quantitatively added when mounted on the ready-mixed concrete car, and the mixing ratio of cement and water may use water by weight of 60 to 150% with respect to cement 1. .

In addition, the pulverization of the waste urethane foam and styropol in the above is preferably 1 to 15mm.

In addition, the mixing ratio of the waste urethane foam and waste styropol when mixing the pulverized waste urethane foam and styropol in the above is preferably 5 to 7: 1 to 3 by weight.

According to the present invention as described above, when the production of mortar for concrete does not use aggregates, such as sand, the environment is clean, since waste materials are used, it is possible to prevent environmental pollution due to recycling, so there is no need for pollution prevention facilities, and use of aggregates Not only does not cause cracks, it has the effect of high compressive strength and low thermal conductivity construction.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments, which are intended to be practiced by those skilled in the art, but are not intended to limit the spirit and scope of the present invention.

First, in the present invention, it is preferable to grind the polyurethane foam and styropol to 1 to 15 mm, but if it is too small or large, there may be a problem of sound absorption or strength after construction. 100% of waste styropol is prepared, or the pulverized waste urethane foam and waste styropol are mixed at a weight ratio of 5-7: 1-3 to make a urethane pole.

Then, the waste urethane foam or styropol or urethane pole and admixture and cement are calculated by volume ratio to quantitatively calculate 50 to 80% urethane pole, 0.1 to 4% admixture, and 19.9 to 40% cement.

The admixture in the above is possible as long as it has a material separation prevention and fluidizing agent function. Preferably, the main component uses cellulose ether-based hex gray powder.

The content ratio as described above takes into account the economics according to the amount of cement at construction and after construction, strength functionality as concrete, separation and fluidization functionality between materials, compressive strength and the effectiveness of alternative concrete.

The urethane poles and admixtures calculated as above are first mounted on the ready-mixed car to dry the beams, but when the cement and water are added simultaneously, the problem of mounting due to the increase in volume may occur. .

Then, the mixture of the quantified cement and water is mounted on the ready-mixed tea, wherein the mixing ratio of cement and water is added to the cement 1 by weight 60 to 150% by weight, which is adjusted according to the required strength and the like.

Here, cement and water may be premixed in the above ratio to make a paste, in which case a little more water is added than the fixed amount.

Then, the ready-mixed concrete mounted with the urethane pole, admixture, and cement paste is poured to the construction site, and cured.

At this time, the concrete of the ready-mixed concrete car may be put into a mixer waiting at the site and remixed, and may be pumped, placed and cured by a mortar pump connected to the mixer.

As described above, urethane poles and admixtures are mounted near or away from the site, and cement paste is mounted again, or at the site, so that the urethane poles and admixtures are mounted at the site so that the site near the site or the unnecessary ready-mixed concrete can be kept clean.

[Example]

Calculated waste poly urethane foam and waste styropol in a ratio of 7: 3, mixed admixture, and cement in a volume ratio of about 67: 2.5: 30.5, and prepared about 100% of water by weight of cement. After passing through the process, it was put into a blender and remixed, and then cured after pouring and pouring with a mortar pumping machine connected thereto.

In the above, the ready-mixed concrete car is a conventional one, the mortar pumping machine has a discharge amount of 15 to 26m 3, a maximum conveying pressure of 170 bar (bar), and a power unit of 380V ^* 60KHZ ^* 60 horsepower, a discharge diameter of 50m / m, the maximum conveying distance The thing of 800m horizontal and 200m vertical was used.

The use of conventional buffers and lightweight foamed concrete and the field construction under the same conditions at the same size according to the method of the present invention are shown in Table 1 below.

Existing standard floor structure and construction according to the present invention Existing construction Construction work according to the present invention  4 ~ 5 days of joint taping in buffer  Pour: 2 days  Lightweight foam concrete pouring: 2 days  Curing: 1-2 days Lightweight foam concrete curing: 4 days  Heating piping installation and fixing: 1-2 days  1 day (fixed pin simultaneous work)  Pipe storage test: 2 days  2 days  Ondol Plaster: 2 days  2 days  Plastering: 7 days  7 days  Total construction period: 22 ~ 24 days  15-16 days

Table 2 is a physical property comparison table of the standard floor structure constructed as described above.

Comparison of Properties of Constructed Standard Floor Structures division Shock Absorber + Lightweight Bubble Con'c (Conventional)
Construction according to the present invention
Thermal conductivity
(kcal / ㎡h ℃) division Thermal Conductivity (kcal / ㎡h ℃) division Thermal Conductivity (kcal / ㎡h ℃) 0.4 article 0.112 or less 0.4 article 0.09 or less 0.5 article 0.138 or less 0.5 article 0.112 or less

Compressive strength
(kgf / cm2) division 7 days 28 days division 7 days 28 days 0.4 article 5.1 and above 8.15 or later 0.4 article 7.0 or higher 14.28 or later 0.5 article 9.18 or later 14.28 or later 0.5 article 9.0 or higher 15.00 or more ※ Compressive strength: It should be more than 14.28 (kgf / ㎠) after 28 days of curing, but it is 7 ~ 10 (kgf / ㎠) when tested according to KS F 4039. Compressive strength: After 28 days curing, 14.28 (kgf / ㎠) or more satisfied, when tested according to KS F 4039, 15.0 (kgf / ㎠) or more. Adhesion strength
(kg / ㎠) - 5.5 Flexural strength
(Cm / cm 2) - 6 Flow value Bubble Test Standard 18 or higher KS test standard 18 or higher



Length change rate
(%) division % Change division % Change 0.4 article Less than 0.4% 0.4 article 1.08 swell 0.5 article Less than 0.5% shrinkage 0.5 article 1.08% expansion Dry shrinkage: As mortar is diluted with cement + water (50 ~ 60%) + liquid foaming agent, 50 ~ 60% of water escapes quickly during curing and cracking is inevitable due to dry shrinkage.
? Requires water cycle process for curing
? Requires additional process for crack repair and supplementary work -No shrinkage: 10% to 20% of water escapes when curing with mortar mixed with cement + urethane pole + water (30 ~ 40%) + admixture, and there is no crack because the urethane pole aggregate is dry expanded.
Urethane poles absorb 20% of moisture and evaporate slowly during dry curing.
Settlement depth
(Mm) division Settlement depth (mm) division Settlement depth (mm) 0.4 article Shrinkage less than 15 0.4 article 0 0.5 article Less than 10 shrink 0.5 article Interlayer noise
(Certificate test passed grade 4 or higher) When measuring construction on the slab
Lightweight Shock: Level 3
-Shock Shock: Level 4 Difficult
(Test Result of 180mm Slab Condition, Korea Institute of Construction Technology) When measuring construction on the slab
Lightweight Shock: Level 3
-Shock Shock: Class 3
(Korea Institute of Construction Technology) 150,180㎜ slab condition test

As shown in the tables, it can be seen that the construction method according to the present invention is excellent in terms of physical properties while reducing the total construction period.

Claims (6)

Pulverized waste urethane foam or waste styropol or the waste urethane foam and waste styropol to make a urethane pole, the urethane foam or waste styropol or urethane pole; Admixtures; And quantitatively calculate cement to be added in a volume ratio of urethane pole 50 to 80%, admixture 0.1 to 4% and cement 19.9 to 40%, and then mix the quantified urethane foam or styropol or urethane pole and admixture in the ready-mixed tea. A method of constructing concrete containing urethane poles as a main component, characterized in that the beam is mixed with the quantitatively calculated cement and water, which is prepared in a paste state, mounted on the ready-mixed concrete and transported to the site while mixing. The concrete construction method of claim 1, wherein the mixture mounted on the ready-mixed concrete vehicle is pumped and poured on site by a mortar pumping machine connected to the mixer and connected to the mixer. The method of claim 1, wherein the cement and water are mixed in the paste state separately. The method of claim 1, wherein the mixing ratio of the cement and water is 60 to 150% by weight of water based on cement 1 by weight. The method of claim 1, wherein the waste urethane foam and the styropole is pulverized to 1 to 15mm. The method of claim 1, wherein the mixing ratio of the pulverized waste urethane foam and styropol is 5 to 7: 1 to 3 by weight.