Can green building materials be reduced at 5 ° C room temperature?Visit the construction site of the Chengdu project | Special report of the "Autumn Tiger"

Cover reporter Yang Lan Photography Report

How does the building material insulated in the continuous high temperature weather? Is there such a new material that can effectively block the high temperature outdoors and make people in indoor activities feel cool?

From July to August, Sichuan high -temperature weather has attracted many attention from the country. Among them, Chengdu Jianyang can be described as high -temperature "champion". On August 17, the sun was like a fire. Cover reporters came to the construction site of the Sichuan West China Group project in Luojia Village, Caichi Town, Jianyang City, to explore the green building materials.

According to the relevant person in charge of the project, the insulation materials used in the project can meet 65%of the energy -saving requirements. The thermal insulation effect is 10 times that of ordinary concrete, 7 times of clay bricks, and 6 times the glass.

Can keep warm:

With it as an outer wall, the temperature difference between indoor and outdoor can reach 5 ℃

On August 17, the end of the past, the Qiu Tiger continued to be "raging". On the streets of Luojia Village community in Caochi Town, Jianyang, there are rare vehicles on the top of the head of Luojia Village. At about 11 am, the outdoor temperature has reached 42 ° C, and there are no citizens who go out.

Here, there are 32 buildings under construction, which will be part of municipal housing security in the future. The construction progress of each building is different, but they all have a commonality: the average usage rate is 50%of the green building materials that can heat insulation, fire prevention, low bullet shock absorption, water resistance, and fire prevention. Aerated Concrete.

Green building materials everywhere.

What is the thermal insulation performance of green building materials? You need to "personally" feel. After standing out of the outdoor, there was sufficient physical temperature, and the reporter and the chief engineer of the China West Group subsidiaries and the West China Green House Building Materials Equipment Equipment Division to the Chief Workers and his party, entering the "model room" built by the project to test the building materials to test the building materials Essence "It has the effect of shading, but it is not just shaded." "The temperature dropped at once, and the temperature temperature was reduced by 3 degrees." "I think more than 3 degrees ..." Everyone talked about feeling.

"Under high temperature weather, the heat insulation function of green building materials is particularly important." Tell reporters to the chief, "Before, we did a test in Luzhou. In the room, the temperature difference with the outdoor can reach 5 degrees. If ordinary building materials such as concrete or ordinary wall tiles may only be 0.5 ° C -1 ° C. Today, this 'model room' has no window, otherwise the effect will be more immediately. "

light in mass:

The 2 -meter -high board is only 50 kg, and one person can operate

Why can steaming pressure and reactive concrete material insulation? What is the production process?

According to the chief worker, the material contains many small holes due to the particularity of the production process, which can form a good thermal work performance. The thermal conductivity is between 0.08-0.15W/m*k. After testing, a single wall uses B05 A3.5 and 200mm to increase the product. Its self -insulation can meet 65%of energy -saving requirements. The insulation effect is 10 times the ordinary concrete, 7 times the clay bricks, and 6 times the glass. "Not only can it be insulated, but also‘ anti -cold ’. Using 200-250mm foam concrete wall, the insulation performance is equivalent to 490mm thick brick masonry, which is better for energy -saving walls and roof insulation layers.”

"There is also a name of steaming pressure and gas, which is called lightweight pneumatic concrete because it has a very light weight. After our calculation, its density is 500kg/m3, only 60%of the water, and concrete. 25%. Therefore, the amount of employees required for installation materials is greatly reduced, which can effectively respond to the current situation of workers' shortage. "

The density of steaming pressure and pumping soil (right) is half of the water, which can float on the surface. The left side is ordinary soil.

In the "model room", he pointed to the chief worker about 2 meters high and said, "Such a large piece of ordinary concrete must be lifted with machinery. But if it is steaming pressure and gas, it can be operated by a person because it is because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is done because it is operated because it is done because it is done. It only has about 50 kg. "

Building blocks:

Prefabricated buildings do not require violent demolition, and high circulation utilization rate

Green building materials are a way to build prefabricated buildings and a path to realize green buildings.

"In 2007, we were the first enterprise in the province to study steam pressure and gas concrete. In 2009, we established the first factory to manufacture steam pressure and gas concrete. The material contraction rate 'and other technical difficulties. At the beginning, it could only produce block -shaped steam pressure and gas concrete. In 2012, we could make plate -shaped -like. The construction has brought great convenience. In addition, the "Technical Regulations for Self -Insurance Engineering of Steaming Pressure and Aerated Concrete Blocks", which we edited, are still local standards. "Speaking of the material research process, the chief workers are like several treasures.

Building a house is like a patchwork -to explain the meaning of prefabricated buildings in a popular manner. Traditional construction of concrete is a layer of layers. The house is a whole. It can only be used for violence to remove it. This causes great obstacles to recycling and use. Most building materials can only be filed. Green building materials are different. Take steaming pressure and gas as an example. When the construction drawings become "component production drawings", each component will produce different shapes in the factory according to the need. Just stick and fix.

"There are many advantages of prefabricated buildings. For example, there is no need to use violent destruction when disassembling. The material circulation is high. Green building materials also have environmental protection functions. In addition to the use of materials, the enhancement of the heat insulation performance can reduce people's frequency of air -conditioning indoor air conditioners indoors. In addition to steaming pressure and gas, we are also developing insulation coatings, heat insulation curtains, etc. "The prefabricated bay window installation of the construction site, workers are hanging operations.

It is reported that the project visited by the reporter was the first batch of high -end matching projects in Chengdu that was 3.5 kilometers west to the west of Tianfu International Airport. At present, people's defense, high -rise residential houses, multi -storey commercial, and youth apartments have been planned.

started late:

After 3 years in Sichuan, the proportion of newly started assembly buildings will reach 40%

The research and development and application of green building materials starts late. Compared with other cities that have developed longer, it is still in a "cute new" state.

In this regard, Huaxi Green House has done many investigations and material combing. "The application of green building materials and prefabricated buildings, the coastal region and economically developed northern regions develop earlier and better. Sichuan starts to start at night. Such a dilemma is not caused by technology, but it is derived from the application scenario. There are not enough. "Analysis of the chief workers," The coastal area is humid, the temperature is high all year round, the temperature difference between the northern region is large, the insulation demand is high, and the market is broad, so Sichuan is different. The insulation of building materials does not value enough. "

In fact, green building materials also have disadvantages. To the chief worker, the "ultimate goal" of West China Green House is to overcome these shortcomings. For example, the material strength of the material is higher, the material contraction rate is lower, and the mechanized assembly is to solve it. Problems, etc.

Huaxi Green House is located in the prefabricated building industry base of Guanghan, Deyang, and all the steam pressure and gas mud are produced here.

Vigorously promoting prefabricated buildings is an important strategy of Sichuan Province. In April 2021, the Sichuan Provincial Housing and Urban -Rural Development Department issued the "Five -Year Action Plan for Raising the Quality of the Development of Prefabricated Buildings", which clarified the development goals of Sichuan 2025 installations and buildings, and used digital technology to drive the intelligent development of construction and construction industrialization. , To promote the level of prefabricated building construction and construction quality significantly, and achieve the goal of building industrialization development goals with high efficiency, high quality, low consumption, and low -emissions of engineering construction. By 2025, the province will start 40%of the newly built buildings in the province, and the assembly rate of prefabricated buildings will not be less than 50%. A batch of green building demonstration projects with high assembly rates above A -level or above.

What is exciting is that even if Sichuan is "Mengxin", more and more companies have joined in to contribute to the development of prefabricated buildings. As a part of the industry, the chief worker firmly believes that Sichuan will soon become "senior players". In the future, such green building materials will only become more and better quality.

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