Mr. Liu of the Beijing Writers Association recently reported to this newspaper that the permeable bricks
that had been paved on the sidewalks on both sides of Heiquan Road for the neighborhood he lived in have been damaged.
In the past few days, our reporters visited many places and found that "Peach Crisp" permeable bricks
are not uncommon in the city-in Beijing City College, a pavement with paved bricks
is now potholes; in the People's Park in Miyun Jingxi District The permeable bricks
have now been broken into multiple pieces, and the road surface is colorful. Recently in Panjiayuan, workers lifted up the permeable bricks
that have been broken on both sides of the road and laid new permeable bricks
After the "July 21st" natural disaster, how to speed up the construction of rainwater flood projects and deal with the problems of urban waterlogging has once again attracted people's attention. Laying permeable bricks has
become one of the solutions to this problem. According to reports, this city will lay an additional 150,000 square meters of permeable bricks
this year. This reporter's soldiers divided the road and visited the reason why the permeable brick
became a "peach crisp" brick.
"If you want to be permeable, you must leave open space. Therefore, the permeability and strength of permeable bricks
are a pair of three-dimensional." Qin Shengyi, head of Beijing Guangzhou Bangmin Technology Group Co., Ltd., told reporters that the "weakness" of permeable bricks
has always been in the process of research and development. Facing difficulties. Traditional permeable bricks
use general cement as a binder. Although they can penetrate water, they have poor resistance and low strength. In addition, Beijing is relatively cold in winter, and the cement has poor freeze-thaw resistance. The adsorbed water will freeze and swell in winter, making the permeable bricks
easy to become crisp after two or three years of use.
In fact, as early as a few years ago, the Municipal Science and Technology Commission has noticed the problems presented in the use of permeable bricks
, and has also specifically allocated more than 2 million yuan as scientific research funds to be tackled by enterprises. In the meantime, Guangzhou Wanxin Technology Group developed a new generation of sand-based permeable bricks
, which uses sand in the desert as the material and passes the principle of "perturbing the external tension of water" to process the traditional water-permeable materials through the pores. Difficult, strong resistance, strong swelling, resistance to compression and freeze-thaw. This skill also won the first prize of Beijing Science and Technology Creation.
However, the reporter learned that the high price of more than 600 yuan per square meter when the new permeable brick was
just launched severely affected the promotion. Permeable bricks
on the market are mixed with fish and dragons. The cheapest one square meter is only 30 or 40 yuan. Industry insiders say that many substrates are impermeable during this period, just ordinary bricks. Many unsuspecting communities are eager to get cheap, and using this kind of brick, the road surface will soon show "alopecia".
Mr. Liu introduced that he went to the German province in the autumn of last year to see that in a small and medium-sized city in northwestern Germany, workers were laying permeable bricks
next to the road. The brick particles were as fine as red beans, which were very strong. Shattered. Mr. Liu believes that this kind of brick is harder than domestic grit permeable bricks
at first glance. Some roads have been paved for seven or eight years, and no permeable brick
has been seen with a rough
2. Improper laying: professional construction methods are required, otherwise it is impossible to see through
During the interview, many insiders and experts mentioned that if only one layer of permeable bricks is
laid on the exterior, it can only be posture engineering. Because the permeable bricks
collect rainwater is a systematic project, it is necessary to lay a permeable cushion under the permeable bricks
In 2009, the city issued local regulations for the " Performance
and Inspection Rules for Permeable Brick
Pavements", during which the permeation data should be used for the screed, bottom and bottom layers under the pervious brick
. In 2010, this city also issued the "Sand Sand Pervious Brick
Pavement Specification", which also stipulates that the underlayment when laying permeable bricks
must meet the pervious specifications.
Qin Shengyi, who participated in the formulation of the "silica sand permeable brick
laying specifications" said that under the permeable bricks
, it is necessary to lay a bonding screed and a permeable cushion layer. At the bottom, there is a water pipe to guide the seepage rainwater to the reservoir. It is a perfect water permeable system. The permeable brick is
only the outermost part of the whole system. If there is no strong underground water seepage and water collection system support, permeable bricks
will become posture goods.
Some people in the industry leaked that the appropriate part of the permeable brick
project on the pavement and in the district of this city did not lay a permeable cushion layer, and directly used cement mortar. In this way, the brick is able to seep through, but the water still has nowhere to go when it reaches the ground. Especially in winter, permeable bricks that
have been soaked in snow will freeze. If a new type of permeable brick
or a traditional permeable brick of
better quality is used, the brick body is more resistant and will swell slightly; but if a permeable brick of
lower quality is used, the brick body will soon be crisp.
China World Expo Plaza in Shanghai (laid since 2010)
The sinking square of the Olympic Center (I had a taste of the 721 heavy rain in Beijing in 2013 and was safe and sound)
Xizhimen Transportation Hub of Beijing Metro (Enjoyed the 721 torrential rain in Beijing in 2013, safe and sound)
Beijing Chang'an Street sidewalk (paved at the 60th anniversary of the motherland)
Wait, Guangzhou Wanxin's permeable bricks have been
baptized over the years, and the vicissitudes of all things, still adhere to their original posture, which is not only a manifestation of strong skills and strength, but also the corporate culture supporting its outstanding development. Therefore, when you buy permeable bricks
, you must identify the brand of Guangzhou Wanxin permeable bricks
, please trust the strength of the brand!