JPH09165252A - Cement mortar containing shell and its product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cement mortar containing shell for resolving a problem about supplying difficulty of sand or ballast and difficulty of waste treatment of shells of oyster or scallop by using crushed shell as an aggregate of cement mortar. SOLUTION: In this cement mortar, crushed shell is used as an auxiliary aggregate. The surface of a block molded from cement mortar used the crushed shell as the aggregate is polished to obtain a concrete product wherein gloss specific to the shell is expressed on the surface. The shell is preferably used after crushing to about 2-10mm granular diameter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement mortar containing shells suitable for forming concrete structures or blocks such as walls or floors, and in particular concrete products such as flat plate blocks for sidewalks and curb blocks used for road boundaries. And its products.

[0002]

2. Description of the Related Art Conventional aggregates for cement concrete are sand and gravel, which are collected from mountains and rivers.

[0003]

[Problems to be Solved by the Invention] Since sand and gravel collected in mountains and rivers have become a problem of environmental destruction due to over-mining and are expensive, the price of cement mortar products has become expensive. Is the cause.

In the present invention, the shellfish used as an aggregate in the present invention, especially the shellfish of oysters and scallops, is in a pile of piles in the production area, and the present situation is difficult.

[0005]

Therefore, the present invention was developed to solve the problems of sand and gravel collection and the problems of shells that are in need of treatment at once, and claims 1
Is a cement mortar in which crushed particles of shellfish are mixed into cement or mortar as an extender for aggregates.

A second aspect of the present invention is a concrete product in which the surface of a product such as a block formed by using cement mortar mixed with shellfish as an aggregate is sharpened to reveal the luster peculiar to the shell.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The particle size (mesh) of the crushed shellfish used in the present invention is used as an alternative aggregate such as sand and gravel, but since it is a shell shell, it is not possible to crush it too much. In addition, since the finely pulverized product does not show the luster peculiar to shells, a particle size of about 2 to 10 mm is suitable.

Further, since it is a concrete product that dislikes salt, it needs to be washed with water immediately after the shell is discarded, and if it has been piled up for one month, it is exposed to rain and wind. It can be crushed and used as aggregate.

[0009]

[Examples] The shell of the raw material of the present invention may be of any type, but considering that it can be obtained in large quantities and is crushed, the shell of oysters and scallops is large,
Moreover, a large amount of shellfish are discarded by being processed into bare or canned products in the production area, which is suitable for large-scale collection.

These shells are crushed into particles of various sizes having a maximum diameter of about 10 mm, and the crushed product is passed through a vibrating screen or a rotary mesh screen to screen particles with a particle size of 5 mm or more and particles with a particle size of 5 mm or less. Different use depending on the purpose.

In crushing the shell, a free hammer type crusher Chip Star (trademark) having a rotary blade can cut and pulverize into a desired particle diameter by the rotary blade, and thus the grain size is 0.
The shellfish granules can be used as an aggregate with almost no wasteful fine granules in terms of strength.

For example, a small diameter is used as a fine aggregate for cement and sand to be used as cement mortar, and a large diameter is molded into a block and hardened and then ground to give a shell-specific luster. Manifested.

The standard of the mixing ratio of the shell shell granules with cement, sand and water is 150 cement per 100 kg of shell shell granules.
It is suitable to use kg, 100 kg of sand, and 70 l of water.

The mixing ratio is not limited to the above, and it is of course possible to use a reinforcing material such as a reinforcing bar for the gravel used as a normal coarse aggregate for increasing the strength and for molding. As mentioned above, since the shellfish immediately after being discarded contains some salt, it is necessary to wash it with water using a hose etc. before crushing.

The block is molded by using a shell with a large particle size, supplying mortar mixed in the above-mentioned mixing ratio into a mold, and molding by vibration and pressing, and waiting for curing and curing, and a softening agent on the surface. Apply and sharpen as usual to reveal shell grains on the surface.

The surface of the exposed shellfish particles is polished, so that the shellfish particles are glossy and slightly diffusely reflect light.

[0017]

INDUSTRIAL APPLICABILITY The present invention is to grind shellfish that are piled up in the production area of oysters and scallops and are in need of treatment to be used as an aggregate for cement mortar. Not only can it be effectively used as an alternative auxiliary aggregate for gravel, but in the case of molded articles such as blocks, the unique luster of shellfish appears on the surface by sharpening the surface.

Therefore, when this block is used as a sidewalk flat plate block or a curb block, it is suitable for the landscape. Especially, the curb block shines gently when the car of a night car hits it, and the road boundary is raised so that the front can be confirmed. Has a significant effect on traffic safety.

Claims (2)

[Claims] 1. A cement mortar comprising crushed shells as an aggregate. 2. A concrete product characterized by sharpening the surface of a block formed by cement mortar using crushed shellfish as an aggregate.