JPS63215541A - Manufacture of concrete preventing accumulations such as water scale - 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] [Purpose of the Invention (Industrial Application Field) The present invention eliminates the harmful effects caused by lower moving vehicles that proliferate on the concrete walls of waterway tunnels, such as headraces of hydroelectric power plants, agricultural headraces, etc. This invention relates to a method for producing concrete that prevents deposits such as limescale.

(Prior art) Conventionally, lower-moving vehicles, such as microscopic bloodworms of the Wormidae family, adhere to the concrete of waterways, especially waterway tunnels, along with limescale on the concrete walls, and these lower-moving vehicles begin to build nests on the concrete walls and multiply. do. At this time, the lower moving vehicle discharges a viscous and weakly acidic sputum fluid, and limescale is mixed with the sputum fluid, and over a long period of time, 30 to 100 phlegm is deposited on the concrete wall.
A layered substance called limescale is formed, and as a result, the water flow area of the waterway is reduced. In addition, due to the adhesion of the sputum liquid, the alkaline content of the concrete is destroyed by the weak acidic content, and the concrete deteriorates.
There were problems such as collapse at a thickness of about 20 am and a decrease in concrete strength.

(Problems to be Solved by the Invention) Manual scraping, insecticides, etc. can be considered as means to eliminate the harmful effects caused by the above-mentioned low-grade moving vehicles, but manual scraping work is extremely inefficient, and Work must be done in a bad environment with foul odors, etc. Particularly in waterway tunnels that are built underwater, work cannot be done unless the water flow is stopped.

On the other hand, the work of killing and removing insects from lower-class vehicles using insecticides is relatively simple, but there is a problem in that downstream of the waterway, water purification plants and the like collect water for drinking water, etc., making it impossible to use the water.

The present invention has been made based on the above-mentioned problems, and an object of the present invention is to provide concrete that can protect waterways by killing insects of lower moving vehicles adhering to the concrete walls of waterways without precipitating harmful substances. purpose.

[Structure of the Invention (Means for Solving Problems)] The present invention is based on the invention by adding Wit acid copper, calcium chloride, chrome alum, j! Add each aqueous solution of potassium chromate to form a mixture and precipitate, and use the mixed precipitate as Bortland cement.

Mix with gravel, etc.

(Function) It evenly generates gas bubbles made of minute silicate glass components during the solidification period, which is generated by metal powder such as iron contained in cement, and prevents the collapse of concrete. And chromium can kill insects on low-grade vehicles without precipitating harmful substances.

(Example) Next, one embodiment of the present invention will be described in order.

1st step... Sodium silicate (heavy Baume 66 degrees 18 degrees Celsius)
1 liter, aqueous copper sulfate solution (22 degrees Baume) 2 liters, aqueous calcium chloride solution (35 degrees Baume) 5-15
Add 15 liters (preferably 15 liters) and stir.
After finely dispersing the resulting precipitate, add 1 liter of chrome alum (20 degrees Celsius Baumé) and mix again, then add 1 liter of potassium dichromate (20 degrees Celsius Baumé) and mix with stirring. By this mixing, the precipitate containing copper hydroxide and basic chromium hydroxide is dispersed to the size of sand.

2nd step: The precipitate dispersed to the size of sand is pulverized using a pulverizer such as a colloid pulverizer to produce a pale green emulsion.

Third step: Add 10 liters of an aqueous solution of calcium chloride (20 degrees Baumé) to the finely dispersed light green emulsion to obtain a stock solution.

Fourth step: After pouring about 200 kg of washed sand and about 400 kg of washed gravel into 100 bowls of Bortland cement, a mixed aqueous solution of 45 liters of clean water is added to 5 liters of the stock solution and kneaded.

Fifth step: A template is installed in advance, and concrete mixed with an aqueous solution is poured into the arch-shaped cavity in which reinforcing bars are placed through the hose of a concrete pump.

Sixth step: After the concrete has hardened after a predetermined number of days, for example 10 to 15 days, the formwork is dismantled and the construction is completed.

Next, the operation of the above structure will be explained.

In the first and second steps, by adding a rainwater solution of copper sulfate and potassium dichromate to sodium silicate, a part of the solution forms a precipitate of copper hydroxide and basic coulome hydroxide. Then, in the third and fourth steps, when the emulsion is added to Boltland cement and kneaded, the chrome alum will promote adhesion between the cement particles or between other objects, and the gaps between the cement particles will be filled with the cement particles. Filling with if&particles of solid compounds of copper and chromium as well as monohyrcalcium hydroxide crystals and the adhesion of the sodium silicate itself occur. Furthermore, hydrated silicic acid forms a dense body, and oxidized metals in the cement, such as iron oxide or iron oxide from reinforcing steel, and chlorine ions from calcium chloride, are gradually added to the cement at a ratio of 1 particle to 3 cement particles. While generating minute bubbles due to the silicate glass component, it solidifies with the highly adhesive bubbles conjugated, and is firmly cured in 2 to 4 hours.

This copper removal and metallic compound ionic substances mainly composed of chromium are generated.

Therefore, when a lower vehicle adheres to a concrete wall, even if the lower vehicle discharges weakly acidic sputum fluid due to the air bubbles and ionic substances caused by the silicate glass component evenly scattered on the concrete, the sputum fluid It can prevent the deterioration of concrete due to water stains, and at the same time prevent the accumulation and adhesion of water scale. In addition, when a low-grade moving vehicle touches or licks a concrete wall, insects can be killed by copper potassium, a component of concrete.

The following table shows the strength test results, and the bending strength, tensile strength, and compressive strength are all excellent.

Table 2 (When using magnesium molybdate and fluoride together) G@! IFII) Contraction test
As a result, it was found that the bubbly mixture of metal-containing oxide steel, chromium oxide, iron oxide, and other metals contained in the cocrete and the metal-containing silicate glass component was evenly distributed on the concrete wall surface. For this reason, even if a mixture of weakly acidic phlegm and limescale begins to adhere to the surface of concrete due to lower moving vehicles adhering to the wall surface, the concrete itself will not soften or deteriorate due to the thin film of the silicate glass component. Therefore, it is possible to make it impossible for the lower moving vehicles to build nests during limescale accumulation, and to prevent the proliferation of the lower moving vehicles. It is also safer than concrete, with no precipitation of harmful substances.

The following table shows the results of an ik dew test of concrete I according to the present invention, which was immersed in distilled water for one week.

Water quality test results Spring water
Quality test results (g1 consideration) The liquid according to the present invention was mixed into a mortar block (15asX 15cg
mX4age) with 1450 all evaporated distilled water to 131
The solution leached for 1 hour was used as the test solution.

Tester: Niigata Environmental Health Research Institute The water quality results showed that the water quality was within the drinking water standards, and even though copper sulfate and potassium dichromate were mixed and precipitated, copper, six The content of trace chromium is within the standard value for drinking water, and safety can be confirmed.

It should be noted that the present invention is not limited to the above-described one embodiment, and for example, the specific gravity and blending ratio of each aqueous solution can be adjusted as appropriate based on the room temperature or reaction temperature. Various modifications are possible, such as a concrete layer according to the present invention may be provided.

[Effects of the Invention] The present invention forms a dense body with hydrated silicic acid, and forms thin film-like bubbles due to the silicate glass component by the action of metal oxide in cement and chlorine ions of calcium chloride in the mud state. By generating one spot for every three particles of boltland cement and scattering it evenly over the width of the concrete, it is possible to prevent the concrete from softening due to the weakly acidic components caused by lower moving vehicles, and to prevent concrete from adhering to concrete I and walls. You can kill insects on cars.

Claims (1)

[Claims] After pulverizing a mixed precipitate obtained by adding aqueous solutions of copper sulfate, calcium chloride, chromium alum, and potassium dichromate to an aqueous sodium silicate solution, the fine powder was mixed with Bortland cement, water, A method for producing concrete that prevents deposits such as limescale, which is characterized by mixing it with gravel and interspersing thin film-like bubbles of a silicate glass component in the concrete.