JPS593056A - Self levelling material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-leveling material, and more particularly, to a cement-based self-leveling material that has excellent durability such as water resistance and abrasion resistance, and excellent maneuverability.

Gypsum-based materials are conventionally known as self-leveling materials, and are used for flooring materials and the like. However, since gypsum has low water resistance, it has the disadvantage that it cannot be used outdoors, such as on balconies and rooftops, or in humid basements.

Has a cement-based material been proposed to eliminate these drawbacks, or is it water-resistant? 'frf dynamics is good,
Moreover, no one has yet developed a material whose fluidity changes little over time.

The present invention provides a self-leveling material for cement thread having these properties, and contains the following components (al to td). That is, (al
100 parts of a hydraulic substance consisting of 100-50% cement and 0-50% gypsum (bJ&lJ alkylaryl sulfonate and/or 1-
0.2 to 5 parts of high condensate of J1-riazine derivative (cl
Hydroxycarboxylic acid and/or its salts 0.05~
1 part (dl Alkali metal carbonate and/or alkali metal bicarbonate 0005 to 1 part The main component of this cement is cement.
It may be replaced with gypsum of less than isoelectricity, without significantly changing the effect. Examples of cement include various types of land cement, blast furnace cement, fly ash cement, mixed cement such as silica cement, and alumina cement, and examples of gypsum include industrial gypsum, hemihydrate gypsum, etc. type or ■
It lasts a long time by using molds of anhydrite, etc.

Component (b), a polyalkylaryl sulfonate and/or a high condensate of a triazine derivative (hereinafter referred to as a fluidizing agent), is a necessary component for imparting good fluidity to cement. The amount used is 0.2 to 5 parts, preferably 0.5 to 3 parts, per 100 parts of component (a). 0.2
If the amount is less than 5 parts, it will not be possible to obtain a highly fluid mortar with a flow of 300 or more at an appropriate amount of water, and if it exceeds 5 parts, it will cause a significant delay in setting and have an adverse effect on strength development. Commercially available fluidizers include Kao Soap (Kiku "Mighty 100J, R Mighty 1"), all of which have trade names.
50J, Monomoto Yushi (Co., Ltd. [Ball Fine 510 Kawa, Sanyo Kokusaku Pulp ■ "Sunflow Ps", Hozorisu Bussan ■ [y
t, -1450J, rNL -4000J, Showa Denko■
"Melment" etc.

Using only components (a) and (b), even if it is possible to impart high fluidity to the mortar, the deterioration over time is large, so the fluidity will not be lost before reaching every corner, which is a practical disadvantage. Become. Therefore, in the present invention, in order to reduce the deterioration of high fluidity over time, (C1 component hydroxycarboxylic acid and/or so(7) salt Q (hereinafter referred to as hydroxycarboxylic acids) and (d) component alkali metal Acid salts and/or alkali metal bicarbonates (hereinafter referred to as alkali metal carbonates, etc.) are further blended together.

The blended acid of hydroxycarboxylic acids is (a) component 100
0.05 to 1 part, preferably o, i to 0.5 part. If it is less than 0.05 part, no practical effect of preventing a decrease in fluidity can be obtained, and if it exceeds 1 part, strength development will be poor. Examples of hydroxycarboxylic acids include malic acid,
Examples include sodium malate, potassium malate, lithium malate, tartaric acid, sodium tartrate, potassium tartrate, lithium tartrate, citric acid, sodium citrate, potassium citrate, and lithium citrate. Among these, particularly preferred are citric acid and its salts.

The amount of the alkali metal carbonate used is 0.05 to 1 part, preferably 0.1 to 0.5 part, per 100 parts of component (a). The role of the alkali metal carbonate is to promote the effect of preventing the fluidity from decreasing over time, and to increase the rise in strength after hardening and hardening. effect is not sufficient. Examples of alkali metals in carbonates and bicarbonates include lithium, sodium, and potassium.

By blending aggregates as necessary and adding an appropriate amount of water to the composition having the above proportions, a self-leveling material having the desired performance can be obtained. In addition, by blending inorganic fillers such as silica sand, calcium carbonate, fly ash, and blast furnace slag with the self-leveling material of the present invention, it is possible to further improve quantitative economic effects and wear resistance. I can do it with Fu too. The amount used is at most 200 parts of culm per 100 parts of component (a).

Furthermore, when an organic resin is used in combination, not only acid resistance and chemical resistance are improved, but also adhesive strength, bending Tff+', and fluidity are improved. Organic resins include natural rubber (NR), chloroprene rubber (CR), and styrene-butadiene rubber (
SBR), acrylonitrile butadiene rubber (NBR)
), methyl methacrylate butadiene rubber (MBR)
, rubber latex such as butadiene rubber (BR), polyacrylic acid ester (PAE), I IJ vinylidene acetate (PVAC) and its copolymers, vinylidene chloride, vinylidene chloride (PVDC), polyvinylpropionate (PVP), epoxy, asphalt , rubber asphalt, resin emulsions such as Parafum A, or their mixed latexes, mixed emulsions, aliha cellulose derivatives, methyl cellulose (MC), polyvinyl alcohol (PVA), polyacrylates, and water-bathable materials such as furfuryl alcohol. Examples include polymers and urea, and powdered versions of these may also be added.

The effects of using the self-leveling material of the present invention are as follows.

(11) It has high fluidity and its deterioration over time is small, so
Pumping is possible.

(2) It has excellent self-leveling properties, so when used for flooring, construction costs are low and construction can be done quickly.

(3) Because it is highly water resistant, it can be used outdoors, where conventional plaster-based leveling materials could not be used, such as balconies, rooftops'o) Construction and basements that are prone to humidity,
It can also be used in underground pits, etc.

(4) Since it has excellent wear resistance, it can be used on warehouse floors, aisles, etc. where transport vehicles such as forklifts come in and out, where this is required.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Note that the percentages and parts stated in the specification are all based on Ichiki standards.

Examples: Ordinary Portland cement, ■type anhydrite (fineness 6,
500 CIn2/,! i'), superplasticizer L L7te(
7) -Showa Denko, whose main component is a high condensate of rifsin derivatives (product name [Melmen l-1'i''-IDj, sulfur and lium citrate, thorium carbonate, fly ash and water in Table 1) It was mixed according to the following.

The Ii'i'F flow of these mortars, its flow over time, leveling accuracy, water resistance, and abrasion resistance were measured below. The results are shown in Table 2.

In addition, each physical property was determined as 1f111 as follows.

(1) Flow: Non-impact flow is JIS R520
Using a flow cone of 1 standard, knead the smooth acrylic resin of F remortal horizontally, and the spread radius of the egg in the form of a shock. Stirring was continued and 30 minutes after kneading, the mixture was similarly heated to il+119.

(21 leveling accuracy: 5 oocc slurry width 10
The water was poured from one side of a gutter placed horizontally, and the slope was measured.

(3) Strength: Molding a 4X4X16crIl specimen,
The fin dry curing was performed at 20''C, SO% ordinal, and the water curing was performed in water at 20°C after one day of air drying.

(4) Water resistance: After air-drying a 4 x 4 x 16 cIn specimen for 24 hours, it was immersed in running water at 20°C for 2 weeks and observed.

(5) Abrasion resistance: 10φ x 20 after 28 days of air drying
The crn specimen was packed in a vibrating bot mill equipped with a stainless steel container with an inner diameter of 145 φ x 2.2.5 1 am, together with a 10 φ steel ball 7, and operated for 60 minutes at an imaging rate of 1110 times/min and an amplitude of 10. After checking the wear condition of the specimen,
I guessed it.

In addition, in Example 1, the proverb '! Hanasen soap whose main ingredient is polyalkylaryl sulfonate instead of Surumene 1-F-10J is used as a chemical agent.Product name: Mighty 1
50'', carbonate with acetic acid, sodium malate or thorium gluconate instead of sodium citrate)
When tests were conducted using thorium carbonate instead of lithium, good results comparable to those of Example 1 were obtained.

Reihaku below

Claims (1)

[Scope of Claims] A self-leveling material containing the following components (al to (dl). Hard substance 10 (1 part by weight)
b) 0.2 to 5 parts by weight of polyalkylaryl sulfonates and/or high condensates of triazine derivatives (0.05 to 1 parts by weight of C1 hydroxycarboxylic acids and/or their salts (dl alkali metal carbonates and /or alkali metal bicarbonate 0.05 to 1 part by weight