In the past, lime was used to build houses in rural areas, but now it is used less, what is the reas

In the past, self-built villas in rural areas did use more lime powder. Now the people who use it have beenThere are not many menstruations, but you still need to use some points when you cover them. The subject asks why it is used less now.

To think about this problem, we first have to figure out where lime powder was used in the rural self-built villas, and then talk about why it is used less now. First of all, lime powder should be used in the foundation of the ground, first the lime powder is soaked in small water and then ground into the powder, and then sprinkled in the roadbed pit that has been dug and the soil has already been turned, and the lime powder is mixed with the soil and then rammed to make it produceThirty-sevenSoil, lime powder on the ground when exposed to moisture becomes harder, producing a layer of waterproof, fireproof and firm foundation. The top is to use lime powder when cutting bricks, and mix lime powder in the mud

Then use this kind of mud wall, and it is very strong after being made. Then there is the use of lime powder in the house. Lime powder and mud are mixed with some straw or wheat bran and used as architectural paint powder on the wall.

Often, it is the lime powder that dries to make it waterproof and glow, similar to the meaning of architectural paints used today. In the previous house, the civil structure was selected, and an appropriate amount of lime powder was added to the mud used for the wall to improve the coagulation of the welding mud. Nowadays, the building is built with concrete, and the key condensation substance of concrete is concrete, and if lime powder is added to the concrete, it will greatly reduce the solidification of concrete, <>

This is the wrong target, so the use of lime powder in modern buildings is very rare, only a little as the internal and external walls of the wall scraping lime powder of the structural force is worse than concrete, like many brick houses in the past, the house is made of lime powder, many houses through decades of sun and rain, many of the walls of the house have been cracked, the structural force of lime powder is far inferior to concrete. In today's houses, the walls are all made of wall paint and interior wall putty powder.

glue). Also reinforced concrete.

On the wall also do moisture-proof. For example, if the lime wall is moisture-proof, the plastered ash will fall off after encountering water, and it will be removed after moisture-proofing. The concrete is relatively stable, whether it is made of moisture-proof or wall tiles, it is much better than lime walls.

Therefore, now rural people will use much less lime powder to build houses, all of which are directly used cement and sand, and the structural force should be greatly improved。Nowadays, lime powder is used less, mainly because the cement output has been further improved, China's cement production has long accounted for more than 50% of the world, with the improvement of everyone's daily life, more willing to apply this kind of durable, durable, easy-to-use concrete, who also needs to be as in the past lime powder, mixed with hemp knife. Moreover, now there is basically no lime powder in the wall plastering the wall, and the internal and external walls that used to be plastered with grass and mud are only replaced by concrete, which was used in the pastQuicklime powdercame to paint the wall, and now it has been replaced with putty powderwall coveringsand other new building materials, the foothold of lime powder has been greatly reduced, and it is very rare to see lime kilns that burn lime powder all over the country, and it is not easy to buy lime powder again.

It is due to the fact that some of the materials are more suitable and the quality is better, so they are used less.

Because there are many toxic substances in lime, if you use lime to build a house, it will have an impact on people's bodies.

Because people's living standards have improved now, all houses will be built with reinforced concrete, which will be stronger.

There are many people who will renovate their houses in the countryside or choose to build their own houses in the countryside. But when building a house, many people also choose to use hydrated lime.

and sand, and then add a small amount of cement. This can also make the house stronger, but many people think that cement is also stronger when compared to lime and cement. Moreover, the cost of cement is also relatively low, so lime is slowly fading out of the construction sites of self-built houses in rural areas.

The cost of cement is also relatively low, and many people also say that the role of cement is still very good. And its cost is relatively low, so cement is still deeply liked by many people. People also like to use cement, and they say that cement is also particularly conducive to construction.

And in the process of building their own houses, they will also use a small amount of lime, so many people also feel that lime is more sought after by people. <>

Cement houses are very strong, and I hope that people can also choose the right materials, and sometimes everyone thinks that lime is better, which requires people to choose differently. However, now lime is also slowly fading out of the construction site of self-built houses, and many people do not use lime anymore. They said that cement is more cost-effective and very convenient in the process of building a house.

They say that houses made of cement are also stronger. <>

Lime is also not very good, sometimes cement is also very good, if you use cement when building a house, then it can also build a better house, and it can also make the built house more solid. After all, a house made of lime is not very useful, and sometimes rainwater seeps into it and the hardened lime will collapse, and the house will collapse. I hope that people will also be able to choose cement to build their houses, which will also be stronger.

After all, cement is also very good for building houses, and sometimes it will bring better performance to people, and cement is also particularly strong.

Of course, it is cement, because lime, if it encounters a particularly humid season or when it rains heavily, it will be washed away by water, but lime has the function of killing insects and preventing insects, so people will plaster lime on the exterior wall.

It is definitely stronger to use cement, but lime is cheaper, so most people still choose to use lime to build a house.

Of course, cement is stronger, because cement is particularly dense, so it is particularly strong to build a house.

First of all, lime needs to be used in the underground foundation, first soak the lime with water and turn it into powder, and then sprinkle it in the foundation ditch that has been loosened, and the lime and soil are mixed and tamped to form Panax notoginseng soil, and the lime is getting harder and harder when it encounters moisture on the ground, forming a layer of waterproof and solid foundation. The appropriate amount of lime is added to enhance the solidification of the welding mud, because the lime will be more rigid and hardened after drying in the soil, and the adobe wall will be stronger. Now the buildings are built with reinforced concrete.

The main solidifying substance of concrete is cement, if lime is added to cement, many people build houses, at that time they are using lime, at that time cement was expensive, lime was cheap, lime was also popular, plus the floor was not high, lime at that time has been very popular. But why is lime less used in recent years? Just listen to Xiao Zhao and talk to everyone.

The face ash, even the bottom layer ash, can be said to be completely absent in today's rural areas, which was still in the early years. Nowadays, it is directly scraped putty after painting, and then painted, or directly pasted with wall tiles, etc., which can be said to be completely useless, which has caused the reduction of lime consumption. The building did not disappear for a long time, from the coarse lime that had just come out of the kiln before, to the bags of fine lime that were packaged later.

It is in recent years that lime has completely faded out of the construction market, so what is the reason for the complete disappearance of lime? I think there are several reasons for this. Lime has been widely used for a long time.

According to research, lime was used in China in the 7th century BC, and the most widely used is as a building material. Lime is made of limestone, dolomite, chalk, shells and other ores with high calcium carbonate content, after 900 1100 high temperature calcined cement plant and rarely add the house is basically thatched adobe house, good stone tile house form. They are all single-storey houses, the structure is not so complicated, and it is relatively simple to take lime, take us here, there is a lime kiln more than ten miles away, and the lime is pulled back with a plate cart or ox cart.

In the past, the cost of lime was relatively cheap, the production process was simple and there were many rocks at that time, many manufacturers directly built a large number of kilns for firing lime, the advantages of cement gradually occupied the market, and its solidity was much stronger than lime. The cement has high density, stronger hardness and frost resistance, strong permeability resistance, and better safety and thermal insulation for the building. Houses made of lime used to collapse during heavy rains.

Because the viscosity of lime is not as high as that of cement, and the firmness is not as high as that of cement, and the cost of cement is also very low.

Because of the current social progress, they are building houses with some advanced things, and lime will be used if people's ability and economy cannot reach it before.

Because the effect of using lime is not very good, most of them will now use latex paint with better effect, so it is used less now.

The first point is that in the past, the lime used to build houses in rural areas was mostly used, but now it is rarely used, and the second point is that because the rural houses are now very technical, they are all very good materials.

In the past, lime was used to build houses to sterilize and dry, but now there are better waterproof coatings, so it will be used less slowly.

The answers are as follows:

The aim is to make the building stronger and more durable.

The main components of quicklime commonly seen are calcium carbonate and calcium hydroxide. These two components will react chemically when they encounter carbon dioxide in water and air and turn into hydrated lime with a certain hardness and cohesiveness.

After plastering the wall, on the one hand, the water evaporates during crystallization, and on the other hand, the calcium hydroxide crystallization precipitation becomes crystallization strength; On the other hand, due to the evaporation of water, a network structure is formed inside, which increases the intensity. In addition, calcium hydroxide absorbs CO2 to form a continuous calcium carbonate block, which can strengthen the wall.

The main components of lime are calcium carbonate and calcium hydroxide, after building a house with lime, these two substances in lime will react with carbon dioxide and water vapor in the air to make the wall stronger.

You don't need lime at all to build a house, you use lime because it's cheaper. Most of the houses built in rural areas are now made of cement concrete, and most of the houses are built of red bricks. The state has strict regulations on the lifespan of a house.

Just like the one-story residential building we built a long time ago (belonging to the third category of buildings), the state stipulates a service life of 20 years! Of course, almost no one is building such a house now.

House, the technical term for the house we are building now is: civil multi-storey house (belonging to the second class of buildings)., with a specified service life of 50 years. Whether it is a brick-concrete structure or a frame structure, we must design according to these standards.

The design service life is 50 years.

When it comes to building a house, we immediately think of using red bricks, cement, sand, and other materials. With the development of modern technology, these materials have become obsolete. The promotion and application of many new materials has made it easier and easier to build a house.

We will briefly introduce these new building materials, which are inexpensive compared to traditional red bricks and have many advantages.

foam material. In fact, it is not surprising that houses are built out of foam. Foam has long been used abroad.

Foam has the following advantages: first, it is very environmentally friendly, excellent thermal insulation performance, warm in winter and cool in summer, suitable for building walls, the construction is very simple, and the steel frame structure is completed, and the blocks can be built with foam.

Hollow brick Hollow brick is exactly what the name suggests, the inside is hollow, and the other is lightweight, suitable for non-load-bearing walls. Second, the heat and sound insulation effect is good. Thirdly, it is cheap, saves materials, and the construction is very simple.

Steam bricksSteam bricksIt is made of fly ash or other slag or ash sand as raw materials, through blank preparation, pressing molding, efficient steam curing and other processes. The steam brick has good thermal insulation and sound insulation performance, light weight, low performance, meets the national energy-saving requirements, and is more and more popular with users.

Because nowadays, all houses are tiled, and steel bars are generally used.

This is because lime is harmful to the human body, so it is used less.

Because lime is not safe, and people now have money.

Because lime is not only unsightly, but also of no better quality than anything else.

Maybe it's because it's better to use at the age of 15, but it's quite damaging to the environment and it's quite expensive.

Because now everyone finds that the lime is not very clean, so there is no need to say it.

This is because now the living standards of rural people have improved, and they can use other better things.

It may be that there are more new materials used now, so less lime is used.

The hail demolition in the countryside is leaking and the soil is rotten and the royal is brushed with white ash. It means that it is officially out of poverty.