JPS5988384A - Method of bonding stone material and concrete - 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 method for firmly adhering stone and concrete.

Stone and concrete are often used by bonding them together on building floors, walls, or road paving blocks, crafts, and decorative items. In this case, cement mortar or concrete is applied directly to the stone. Although it does adhere to some extent, it often peels off because the adhesive strength is insufficient.

Therefore, use an appropriate adhesive 2 for the stone or concrete surface.
Pasting has been done by coating, but it is not possible to maintain adhesive strength over a long period of time, and when used on structures in particular, it is often subject to external forces such as vibrations and shocks. Therefore, it cannot withstand use on the sole.

The other method that has been used in the past is to drill holes in the stone and implant the reinforcing bars, and then pour concrete with the reinforcing bars protruding from the bonding surface, and constructing the so-called reinforcing bars as a tie. Because the coefficient of thermal expansion of concrete and stone is different from that of concrete and stone, peeling occurs over a long period of time, and especially when subjected to impact, the stone in areas without reinforcing bars is easily damaged, and construction is very time-consuming. However, it also had the disadvantage of being very expensive because it required thick stones.

In order to eliminate these drawbacks, as a result of various studies, we have invented a method that provides extremely strong adhesion, is easy to install, and is inexpensive.

In other words, cement mortar (17E Stone (2)) made by mixing a synthetic resin emulsion adhesive diluted with water.
It is applied to a surface, and while it is still wet, fresh concrete (3) is poured over it and allowed to harden. At this time, cement mortar (the υ layer should be relatively thin).

As an example of a synthetic resin emulsion adhesive, we used ``Magneline'', a product of Sanki Kagaku Kogyo Co., Ltd., which is an acrylic resin-based two-lining material that is commercially available for rust and corrosion prevention purposes. Adhesive strength was obtained.

To give an example of the proportion used, relatively good results were obtained when 40% of the acrylic resin emulsion was mixed into the water for cement mortar mixing. The amount of this adhesive is
It can be freely increased or decreased depending on the purpose of adhesion.

When the stone and concrete are bonded together in this way, the synthetic resin adhesive creates a strong bond on the entire surface of the stone surface in addition to the adhesive force of the cement, and the cement mortar that is interposed as a contact layer is made of synthetic sand particles. It is wrapped in a resin adhesive and connected to the stone surface.
By pouring fresh concrete while it is still wet, the moisture in the mortar, including the synthetic resin adhesive, will be mixed with the moisture in the fresh concrete, which will cause the structure of the fresh concrete to change between the mortar (υ layer and concrete (3) layer). The result of drying is that the synthetic resin adhesive is connected from the stone surface to the inside of the concrete layer, creating a strong, integral bond.

Generally speaking, concrete mortar and concrete are of the same quality and have the same coefficient of thermal expansion, and the synthetic resin adhesive expands and contracts to compensate for the difference in coefficient of thermal expansion of stone and maintains the connection, so they will not peel off. O Various @-impact tests and peel tests were conducted on the products thus obtained, but the base stone was more likely to be damaged than the adhesive surface to be peeled off.

As described above, this invention provides a very strong bond, the bonding method is extremely simple, only a small amount of inexpensive adhesive is needed, and compared to the method of embedding reinforcing bars in stone, Since the thickness of the stone material can also be significantly reduced, it has a large economic effect and is particularly effective for manufacturing stone blocks.

[Brief explanation of the drawing]

The drawing is a partial cross-sectional view of a stone block bonded by the method of the present invention. l...Cement mortar 2...Stone 3...Ready-mixed concrete (1 other person)

Claims (1)

[Claims] A method of bonding between stone and concrete, which is characterized by applying cement mortar mixed with synthetic resin emulsion adhesive diluted with water to the stone surface, and pouring fresh concrete on top of the mortar while it is still dry to harden it. Adhesion method.