JPH06272203A - Construction method of wooden brick, brick, block or the like - Google Patents

Abstract

PURPOSE:To provide a joint material which is hardened quickly and by which a cracking is not caused and growth of a weed is prevented by constituting a bonding material (joint material) of mixture composed of fine sand, cement and sodium silicate in order to lay a wooden brick, a block or the like on a garden, a hallway, a footpath or the like. CONSTITUTION:A joining material such as a wooden brick, a brick, a block or the like used on a garden, a hallway, a footpath, a park or the like is formed by mixing fine grain sand, cement and sodium silicicate together. A hardener such as sodium carbonate or sodium bicarbonate is added to the sodium silicicate at need. Next, when the block or the like is laid, this mixture is used as a joining material and a joint material, and a sodium silicicate hardened layer is formed, and the cracking or separation is prevented from being caused when the block expands and contracts. Thereby, the joining material by which construction efficiency is improved can be obtained easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing wooden bricks, bricks, blocks and the like used in gardens, entrances, sidewalks, parks and the like.

[0002]

[Prior Art and Problems to Be Solved]
When assembling wooden bricks, bricks, blocks, etc., asphalt, mortar, etc. were used as adhesives and joint materials, but the ability to follow expansion and contraction of wooden bricks etc. due to temperature and humidity changes etc. Therefore, cracks and peeling phenomena are observed. Other methods using resins have problems in terms of durability, adhesiveness, and cost. Further, when cracks or peeling occur at joints and the like, weeds and the like grow from there and spoil the aesthetics, and as a countermeasure, weeds are pulled out manually.

[0003]

As a result of intensive studies in view of the problems of the conventional methods, the inventors of the present invention can inexpensively and reliably and easily construct wooden bricks, bricks, blocks, etc. and prevent the growth of weeds. The present invention has arrived at the present invention by finding a method of doing so.

That is, the present invention is characterized by forming a hardened layer of sodium silicate, which is a mixture of aggregate, cement, and sodium silicate, as a binder at the joint portion when constructing wooden bricks, bricks, blocks and the like. Wooden bricks, bricks,
It provides a construction method for blocks and the like.

In the present invention, the means for forming a hardened layer of sodium silicate between wooden bricks and the like is not particularly limited, but as one means therefor, there is a method of infiltrating and hardening liquid sodium silicate. Sodium silicate absorbs carbon dioxide gas in the air and cures as it is, but its reaction is slow, and it is desirable to use a curing agent for efficient curing.

As the curing agent, it is preferable to use an acid, a metal salt or an aqueous solution thereof, and the metal is an alkali metal (Li, Na, K, etc.) or an alkaline earth metal (Mg,
Ca and the like), and specific examples thereof include sodium carbonate, sodium bicarbonate, calcium chloride and the like.

The type of sodium silicate to be used is not particularly limited, and those widely used for industrial purposes are sufficient. Commercially available sodium silicate is used after diluting with water for easy handling. The amount of sodium silicate used is preferably in the range of 3 to 10 wt%. If it is less than this range, the cured layer cannot have sufficient strength, and if it exceeds this range, the effect is not significantly changed and it is not economical. The amount of the curing agent used may be appropriately selected depending on the desired curing time, the activity of the curing agent, and the like.

As a standard composition for construction using these compositions, fine sand (200 to 300 μm) 70 wt
%, Cement (alumina cement: Portland cement = 5: 95) 25 wt%, 40% sodium silicate solution 5 w
At t%, the amount of dilution water is preferably 5 times the weight of 40% sodium silicate solution.

The strength of the hardened layer thus formed is 2
Is the time after 4Kg / cm ^2, 1 days after 10Kg / cm ² approximately, 2 hours after the construction is person is in enough walk strength. Also, the maximum strength at which weeds can grow roots after 6 days is 6K.
It has g / cm ² or more and can prevent the growth of weeds.

[0010]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Example 1 The compressive strength was measured in order to investigate the workability after construction.
The composition is 70 wt% fine sand, 5 wt% 40% sodium silicate,
Cement (alumina cement: Portland cement =
5:95) 25 wt%, dilution water is 40% sodium silicate 5
Double weight was used.

The test was performed according to JIS5201 (physical test method for cement). The mold was removed 2 hours after the implantation, and the measurement was performed after 2 hours, 24 hours, and 28 days.
As a result, 2 hours later, 4 kg / cm ² , 24 hours later, 10 K
It was g / cm ² and 112 Kg / cm ² after 28 days, and it was possible to prove that the strength was sufficient to withstand a person walking at the construction site 2 hours after the construction.

Comparative Example 1 Similarly, workability after construction with mortar was compared. The compounding ratio is 60 wt% fine sand, 40 wt% cement (alumina cement: Portland cement = 5: 95),
Diluting water is 25 wt% of the whole and fine sand 70 wt
%, Cement (alumina cement: Portland cement = 5: 95) 30 wt%, dilution water is 22 wt% of the total
Two types were prepared, and the compressive strength was measured by the same method as in Example 1.

The obtained results show that after 2 hours (0K
g / cm ² , 0 Kg / cm ² ) and after 24 hours (0 Kg /
cm ² , 0 Kg / cm ² , after 4 days (9 Kg / cm ² ,
6 Kg / cm ² , after 28 days (33 Kg / cm ² , 24
Kg / cm ² ), and it took 4 days or more to obtain sufficient strength for a person to walk.

Example 2 A soil PH test was conducted from the viewpoint of safety. Raw material mixture with a thickness of 3 cm on solid soil [Compound composition: 70 wt% fine sand, cement (alumina cement: Portland cement =
5:95) 25 wt%] above 40% sodium silicate 5w
t% and diluting water (5% by weight of 40% sodium silicate) were sprayed and cured in a room at a temperature of 20 ° C. and a humidity of 60% until the age of 28 days. The pH of each part of the true soil was measured in order to check the penetration into the true soil. In addition, PH measurement is carried out by Japan Highway Public Corporation KODAN
602 (Soil PH test method). The results are shown in Table 1.

[0016]

[Table 1]

As a result, it was possible to prove that there was no problem in terms of safety because PH did not move even though alkaline water was flowed. Example 3 A dry shrinkage test was conducted to investigate the fixed connectivity of wooden bricks.

The test was conducted according to JIS A 1129 (method for testing length change of mortar and concrete). The mold is removed 24 hours after the implantation, and 20 days until 7 days
It was aged in water at ℃ and the length was measured for the first time, and the length at this time was used as a reference. Thereafter, it was cured to a predetermined age in a room at a temperature of 20 ° C. and a humidity of 60%, and the length was measured each time. The composition is 70 wt% of fine sand, 5 wt% of 40% sodium silicate,
Cement (alumina cement: Portland cement =
5:95) 25 wt%, dilution water is 40% sodium silicate 5
It is double weight. The results are shown in Table 2.

[0019]

[Table 2]

As a result, it was found that the shrinkage rate was very small, and the wooden bricks had very high fixability and connectivity. Example 4 In order to confirm the weed formation prevention effect, the bricks were 1 m ×
1m is set in two places, only fine sand is poured into the joint at one place, and the other material is made of this raw material [fine sand 70wt%, cement (alumina cement: Portland cement = 5: 9).
5) 25 wt%] was poured into the joint, and the diluted sodium silicate was sprayed on each joint. 20 ° C in a greenhouse, after 24 hours,
The seeds of weeds were sown on the joints, and watering twice a day was continued for 30 days. As a result, it was found that the joints containing only fine sand had weeds grown on the whole, but no single weeds were grown on the test site, which had an effect of preventing weed formation.

[0021]

EFFECTS OF THE INVENTION According to the present invention, it is possible to very easily fill joints such as wooden bricks using sodium silicate, which is a general-purpose material, and easily prevent weeds from growing on joints. In addition, in a mixed system with a cement-based material, a hardened layer having high strength can be quickly formed, and it can be used in a short time after construction.

Claims (1)

[Claims] 1. A wooden brick characterized by forming a hardened layer of sodium silicate composed of a mixture of aggregate, cement and sodium silicate as a binding material at a joint portion when a wooden brick, a brick, a block or the like is constructed. Brick, block construction method.