Seawater "disrupts" the strength of concrete roads

2023-02-06 10:10:22

According to the Urban Administration Bureau of the West Coast New Area, the construction unit, the pavement damage is related to the strength reduction caused by the strong wind blowing sea water into the concrete during the construction period.

The coastal footpath is damaged (Source: Xinwang reporter Li Xinbang photo)

Xinwang February 6 (Reporter Li Xinbang) "The newly built coastal footpath has been patched so soon, it's really painful to look at it." Recently, many citizens reported to Xinwang that the coastal footpath of Tangdao Bay in the West Coast New Area had been damaged, and the project had just been completed and accepted in January this year. Xinwang learned through the Urban Management Bureau of the West Coast New Area, the construction unit, that the pavement damage was related to the strength reduction caused by the strong wind blowing sea water into the concrete during the construction period. Considering the impact of weather on the quality of maintenance, this part of the damaged section is scheduled to be fully repaired around May 1 this year. People are distressed and worried about

the damaged coastal footpath that

has just been repaired. Ms. Zhang lives near Tangdao Bay. The air and environment near the seaside are good, so she walks here almost every night. But recently, she found something wrong with the way she walks every day. "From Tesco in Australia, the road surface is peeling, and some even the land below is exposed, which is not only unsightly, but also more troublesome if people trip up." Ms. Zhang said that the construction of the coastal greenway in Tangdao Bay started last year and had just been repaired for a few months, so it should not have been damaged so soon. Mr. Li, who

also likes to take a walk here, also questioned the quality of pavement renovation: "Since the pavement has been damaged, why not repair it in time?"? We can't let this short section of the road destroy such a beautiful scenery by the sea.

On February 3, Xinwang came to Tangdao Bay for a field visit. When you enter the coastal greenway, you can see the red and blue footpaths. But after a few steps, the ground began to be uneven, and the stone ground on the footpath was directly "exposed". From a distance, it looked like a "patch" sticking to the ground, and the density of damage was high. As can be seen from the information on the public signs beside the road, the construction unit of the project is Qingdao West Coast New Area Urban Management Bureau, the construction general contractor is Qingdao First Construction Group Co., Ltd., and the supervision unit is Qingdao Jiantong Haoyuan Group Co., Ltd.

In an interview with CITIC, it was learned that the coastal footpath in Tangdao Bay was completed and accepted on January 8 this year, and that the Urban Administration of the West Coast New Area has also learned that some of the pavement has been damaged. "However, the pavement damage is not due to the quality of construction, but because the sea water is mixed into the concrete." According to the staff of the

West Coast New Area Urban Management Bureau, the construction of the coastal footpath began in the second half of 2022, but since October, due to continuous rainfall and strong wind, the sea water has been blown to the shore and mixed into the concrete during the curing period, resulting in the reduction of concrete strength. It is precisely because of the reduction of concrete strength that the road force grabs the surface layer of concrete and cracks the skin, and then falls off.

"Because the road force is a kind of impermeable surface layer, the concrete that does not reach the strength is classified below the surface layer, coupled with the sudden drop in temperature during the Spring Festival, it is easy to form the phenomenon of freezing and peeling in this extremely cold weather, which will also lead to pavement peeling." Staff members said that according to the current situation, the damaged length of the coastal footpath is about 120 meters and the area is about 600 square meters. At present, construction units, supervision units and design units have been organized to inspect the site, and the problems have been demonstrated many times, and solutions have been issued. It is worth looking forward to

the comprehensive renovation of the more beautiful coastal trail around

May Day. As the weather gets warmer, more and more citizens go out of their homes, and the beautiful coastal trail naturally becomes one of the destinations for everyone. Now that the problem and the cause of the problem have been found, when will the coastal trail be restored to its original appearance?

"Now the temperature is low, not suitable for rectification, so we can only clean damaged pavement first, and plan to rectify it around the May Day holiday." The staff said that the preliminary rectification plan would mill the surface layer of the whole line, remove the damage of the concrete cushion, and adjust the surface layer to MMA spraying.

"Thank the citizens for their concern about the construction of the project. It is precisely because of the active participation of the citizens that the quality of urban construction can be continuously improved. In the future, the general public should be more supervised to jointly create a better urban environment." The staff of the Urban Management Bureau said.

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Correlation

According to the Urban Administration Bureau of the West Coast New Area, the construction unit, the pavement damage is related to the strength reduction caused by the strong wind blowing sea water into the concrete during the construction period.

2023-02-06 10:10:22

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