JPH10167795A - Inorganic lightweight mortal material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inorganic lightweight mortal material being lightweight, having suitable executability and capable of freely forming stable coating layer thickness and improving early self-standing property and strength developing property by subjecting an inorganic hydraulic substance powder to dry blending with lightweight aggregate such as pulp sludge, inorganic fine material and inorganic thickener. SOLUTION: This inorganic lightweight mortal material is obtained by subjecting 100 pts.wt. inorganic hydraulic substance powder such as cement to dry blending with 70-160 pts.wt. lightweight aggregate such as pulp sludge sand having about 1.7 specific gravity and <=5mm particle diameter, 10-30 pts.wt. inorganic fine powder material such as pulp sludge ash, 0.2-1.5 pts.wt. inorganic thickener such as disintegrated material of sepiolite, 0.1-2.5 pts.wt. cement dispersing agent such as ligninsulfonic acid, naphthalenesulfonic acid or melaminesulfonic acid, 0.05-0.3 pt.wt. humectant such as methyl cellulose and 0.5-1.0 pt.wt. fiber material, e.g. polyvinyl alcohol-based fiber, having 2-5mm length. Kneading water in an amount of 55-70 pts.wt. is added to the mortal material to provide the objective inorganic lightweight base mortar material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the creation of a lightweight inorganic mortar material, and more particularly to a premixed material (dry blend) for obtaining a base mortar, a base mortar, and a top coat mortar for a building outer wall. Providing a novel inorganic lightweight mortar material that stabilizes the bond between the material and the fine particle composition, accurately forms an appropriate coating layer thickness, and can form a coating layer that is excellent in early self-sustainability and strength. It is assumed that.

[0002]

2. Description of the Related Art Conventionally, concrete foundation work in a general residential building is performed by casting abandoned concrete, arranging reinforcement and forming a form, installing a base concrete, and then assembling a rising form to form a base concrete. The method of repeating complicated processes, such as casting concrete, has become the mainstream, but in recent years, a method of integrating the basic concrete formwork (embedded formwork) to simplify the process (semi-dry foundation method) ) Was developed. In other words, in this method, concrete is integrated without discrimination of concrete, such as discarding, base, rising, etc. Instead, base mortar for setting up metal fittings for holding down the formwork to secure the level of the formwork Is used.

[0003] For the above-mentioned base mortar, a base plate for securing a level is installed.
At that time, the mortar itself needs to be self-supporting and have early strength. That is, it is clear that conventional mortars using conventional natural aggregates are inferior in independence and strength development, and various measures have been taken.

[0004]

However, concrete foundation work, which is the mainstream in general housing construction as described above, has to be complicated due to the repetition of complicated steps, which inevitably increases the number of man-hours. However, there is a disadvantage that the cost must be increased.

[0005] Further, the mortar made of natural aggregates conventionally used as described above is inferior in self-sustainability and strength development, and thus is not suitable for use in the above-described base mortar. Furthermore, since the traditional mortar used for plastering the exterior wall of the house also uses natural aggregates as described above, the unit volume mass of the mortar is large, and phenomena such as sagging occur during painting work, The coating thickness becomes uneven. In addition, in order to enhance the adhesiveness, it will be used excessively cement, but due to such excessive use of cement,
The risk of cracks and the like also increases. Of course, at the site, since the materials are weighed with a bucket or the like, there are disadvantages such as a large variation in each batch and many quality problems and defects.

[0006]

SUMMARY OF THE INVENTION The present invention has been made by studying to solve the problems in the prior art as described above, and has been proposed to be similar to pulp sludge sand obtained by firing pulp sludge. Lightweight aggregate and P
The use of pulp sludge such as S-ash as the base mortar, the mortar for the outer wall and the mortar for coating the outer wall as described above has succeeded in obtaining a preferable inorganic lightweight mortar material by the already-mixed method as follows.

(1) 70 to 160 parts by weight of a lightweight aggregate such as pulp sludge sand and 5 to 30 parts by weight of inorganic fine powder such as PS ash, which are 5 mm or less per 100 parts by weight of an inorganic hydraulic substance powder such as cement. Parts by weight, inorganic thickener 0.2-
An inorganic lightweight mortar material characterized by dry blending of 1.5 parts by weight.

(2) The inorganic lightweight mortar material according to the above item (1), wherein 70 to 120 parts by weight of lightweight aggregate such as pulp sludge sand is used, 0.5 to 4.0 parts by weight of a hardening accelerator, cement Characterized in that it comprises 0.1 to 2.5 parts by weight of a dispersant,
An inorganic lightweight base mortar material which is mixed by adding 55 to 70 parts by weight of mixing water.

(3) 80 to 160 parts by weight of lightweight aggregate such as pulp sludge sand and 5 to 10 to 30 parts of inorganic fine powder such as PS ash, which are 5 mm or less per 100 parts by weight of inorganic hydraulic substance powder such as cement. Parts by weight, inorganic thickener 0.2-
1.5 parts by weight, cement dispersant 0.1-2.5 parts by weight, water retention agent
0.05 to 0.3 parts by weight, fiber material of about 2 to 5 mm in length
An inorganic lightweight outer wall base or topcoat mortar material characterized by dry blending 1.0 part by weight.

(4) The above-mentioned (1) to (1), wherein pulp sludge sand of 2.5 mm or less is used as a lightweight aggregate.
(3) The mortar material for coating on an inorganic outer wall according to any one of the above (3).

(5) The inorganic material as described in any one of (1) to (4) above, wherein a water-soluble emulsion such as a vinyl acetate resin is added and mixed as a part of the kneading water. Series lightweight mortar material.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific embodiment of the present invention as described above will be described. Most of pulp sludge such as pulp sludge sand and PS ash (pulp sludge ash) is conventionally landfilled. However, the pulp sludge sand has a specific gravity of about 1.7 and is light in weight, and its surface shape is rough. When this is used as an aggregate such as mortar, fine particles such as PS ash are used. Focusing on the fact that it is difficult to separate by using it as a mixture with mortar, it is an inorganic substance, does not contain harmful substances such as heavy metals, and has good compatibility as a cement mixture, etc. By using it as an aggregate, we succeeded in obtaining a base mortar material and a mortar material for plastering outer walls, which are lightweight and have excellent self-sustainability.

That is, the pulp sludge sand as a lightweight aggregate as described above is obtained by mixing a fuel such as heavy oil or waste oil with pulp sludge generated in a paper making process and baking the mixture. Is treated as a landfill material, its specific gravity is as light as about 1.7, its surface is rough with fine irregularities, and it is not preferable in terms of touch, but such pulp sludge sand PS ash and fly ash generated by the sintering of pulp sludge as well as the mortar with fine powder and granule material such as blast furnace slag fine powder and cement powder, has the above-mentioned characteristics, particularly difficult to separate, and It is inorganic but does not contain harmful substances such as heavy metals, and it is confirmed that the composition and structure are compatible with cement mixture. Are suitable for residential and other building foundation or aggregate plastering mortar, it is possible to obtain a lightweight self-supporting excellent base or outer wall plastering mortar material.

Further, the pulp sludge sand, fly ash and PS ash have a high water absorption due to having a myriad of voids, require a large amount of mixing water to obtain a required softness, and the mortar itself is liable to stick. In addition to the addition of a cement dispersant to its structure, it is suitable for containing an admixture including a formite-based mineral for imparting thickening and self-sustainability consisting of inorganic fine fibers, and as a mortar application The base mortar contains anhydrite or a hardening accelerator as necessary to provide a hardening accelerator, and the outer wall base or top coat mortar is used to improve water retention and to prevent methylcellulose and cracks. The mortar material suitable for each application can be obtained by mixing the above fiber materials.

As the cement dispersant in the present invention,
Specifically, lignin sulfonic acid (for example, sun extract: manufactured by Nippon Paper Industries), naphthalene sulfonic acid (for example, mighty:
Melamine sulfonic acid (for example, Nissan SM)
F: Nissan Chemical Industries, Ltd.) and polycarboxylic acid (eg, FC: manufactured by Nippon Shokubai Co., Ltd.) or a salt thereof can be used. As a water retention agent, methylcellulose (eg, High Metrose: manufactured by Shin-Etsu Chemical Co., Ltd.) is used. Such a sample can be appropriately adopted. Further, hemp or vinylon fiber is used as the fiber material, and crushed materials such as formite-based minerals (for example, Milcon:
(Showa Mining Co., Ltd.) can be used.

A concrete example of the present invention will be described. First, a concrete example in which the mixed amount of the lightweight aggregate is examined is as shown in Table 1 below. As the amount increases, more water is required to obtain the required softness, and the W / C increases, resulting in lower strength. Further, since the gap between the aggregates is large, the condition of the mortar is rough and BS / C = about 0.9 is optimal, but generally about 0.7 to 0.96 is preferable.

[0017]

[Table 1]

In particular, in the case of a mortar for an outer wall, 10 to 30 parts by weight of PS ash and a cement dispersant of 0.1 to 2.2.
5 parts by weight, inorganic thickener such as crushed sepiolite 0.2
Under conditions of addition of about 1.5 parts by weight or the like, 160 parts by weight of pulp sludge sand is added to inorganic powder 1 such as cement.
It can be added to 00 parts by weight, and as the blending amount of pulp sludge sand with respect to cement increases, the weight decreases, but the strength decreases.

Table 2 summarizes the case where cement and pulp sludge sand are fixed and PS ash or fly ash or blast furnace slag is added in appropriately changed amounts, as shown in Table 2 below. As the amount of PS ash increases, the weight decreases, but the compressive strength and bending strength tend to decrease.

[0020]

[Table 2]

Table 3 below shows a comparison between the case where the admixture is added and the case where the admixture is not added. The addition of the admixture improves the strength and improves the properties and workability. It was confirmed to be favorable.

[0022]

[Table 3]

Further, as a result of examining the admixture (inorganic thickener: the presence or absence of natural formite and the change in the amount of natural formite) as an outer wall foundation and a topcoat mortar, the results are shown in Table 4 below. Regarding the influence of the presence or absence of the admixture containing the dispersant, those without the admixture have rough properties and are not suitable as a base mortar because the water increases and the viscosity of the mortar is small. In a formulation that does not mix natural formite mineral powder that gives a viscous effect, the viscosity of the mortar is small and the workability as a coating property is poor.By increasing the amount of formite mixed, the viscosity increases, and the condition (properties) and construction of the mortar It is known that sex is improved.

[0024]

[Table 4]

When the mixing water is increased, the fluidity is increased and the adhesive property is reduced, so that the workability as a coating property is deteriorated. Suitable fluidity as base mortar (flow value)
Is about 150 to 180, especially about 160 to 170. In addition, the effect of mixing water in the top coat mortar,
The effect of the amount of water on the workability by reducing the particle size of the lightweight aggregate is small, and the workability is good if the flow value is about 150 to 180.

[0026]

[Table 5]

According to the present invention as described above, a lightweight aggregate such as pulp sludge sand having a size of 5 mm or less per 100 parts by weight of an inorganic hydraulic substance powder such as cement is used.
~ 160 parts by weight, 10-30 parts by weight of PS ash, 0.2-4.0 parts by weight of inorganic thickener such as crushed formite, and 0.5-4.0 parts by weight of a hardening accelerator by dry blending Various mortars capable of forming a coating layer that is lightweight and excellent in early strength development can be provided appropriately.

Light aggregate 70-1 such as pulp sludge sand
Mixing 55 to 70 parts by weight with the inorganic lightweight mortar material as described above using 20 parts by weight, 0.5 to 4.0 parts by weight of a hardening accelerator, and 0.1 to 2.5 parts by weight of a cement dispersant. By adding and mixing water, a material having excellent workability as an inorganic lightweight base mortar can be obtained.

Inorganic hydraulic substance powder 1 such as cement
80 to 160 parts by weight of a lightweight aggregate such as pulp sludge sand and 10 to 30 parts by weight of an inorganic fine powder such as PS ash, which are 5 mm or less per 100 parts by weight, and a powdery cement dispersant 0.1.
-2.5 parts by weight, inorganic thickener 0.2-1.5 parts by weight, water retention agent
0.05 to 0.3 parts by weight, fiber material of about 2 to 5 mm in length
By dry blending 1.0 part by weight, an inorganic lightweight product that is preferable as a mortar material for outer walls of houses and the like can be obtained.

By using pulp sludge sand of 2.5 mm or less as a lightweight aggregate of the mortar material described above, an inorganic mortar material having preferable characteristics as an outer wall coating mortar can be obtained.

A mortar having excellent workability is provided by adding and mixing a water-soluble emulsion such as a vinyl acetate resin as a part of kneading water.

[0032]

According to the present invention as described above, a mortar which is lightweight, has an appropriate workability, can freely form a stable and appropriate coating thickness, and is excellent in independence and strength development in the early morning. Therefore, the invention is industrially effective.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masayuki Midorikawa 3-14-15-403, Higashi-Hachiman, Hiratsuka-shi, Kanagawa (72) Inventor Shin Iwasawa 2767-17, Ishikawa, Fujisawa-shi, Kanagawa (72) Inventor Shinya Hiraishi, Kanagawa 1-12-26 Hiratsuka-shi Goten

Claims (5)

[Claims] 1. 70 to 160 parts by weight of lightweight aggregate such as pulp sludge sand and 5 to 30 parts by weight of inorganic fine powder such as PS ash, which are 5 mm or less per 100 parts by weight of inorganic hydraulic substance powder such as cement. Parts, inorganic blend mortar material characterized by dry blending 0.2 to 1.5 parts by weight of an inorganic thickener. 2. A lightweight aggregate such as pulp sludge sand.
2. The inorganic lightweight mortar material according to claim 1, wherein 120 parts by weight are used, 0.5 to 4.0 parts by weight of a hardening accelerator, and a cement dispersant.
Characterized by comprising 0.1 to 2.5 parts by weight.
An inorganic lightweight base mortar material that is mixed by adding a weight part of mixing water. 3. 80 to 160 parts by weight of a lightweight aggregate such as pulp sludge sand and 5 to 30 parts by weight of an inorganic fine powder such as PS ash which are 5 mm or less per 100 parts by weight of an inorganic hydraulic substance powder such as cement. Parts, inorganic thickener 0.2 to 1.5 parts by weight, cement dispersant 0.1 to 2.5 parts by weight, water retention agent 0.05
An inorganic lightweight outer wall foundation or topcoat mortar material, characterized in that 0.5 to 1.0 part by weight of a fiber material having a length of about 2 to 5 mm is dry blended. 4. The mortar material for inorganic outer wall coating according to claim 1, wherein pulp sludge sand of 2.5 mm or less is used as the lightweight aggregate. 5. The inorganic lightweight mortar material according to claim 1, wherein a water-soluble emulsion such as a vinyl acetate resin is added and mixed as a part of the kneading water.