Why do the marbles in the hardcover room crack open and so on?

Recently, Ms. Li spent more than 1.9 million yuan on the Vanke Eco-city (wide bank) on Jinshui Road to purchase a set of hardcover houses. During the inspection, many cracks appeared on the marble floor, and some floors even appeared empty. In March 2014, Mr. Wang bought the house of Jindi Tianzhu last year. After staying for a week, he found that the marble floor of the living room, dining room, bathroom, walkway, etc. of the new house almost all had red cracks in varying degrees.

In October 2010, due to the purchase of a set of landscapes and fine-decorated houses, the marbles were cracked. The house claimed that the woman refused to accept the house and would go to court. The decoration of the house did not meet the corresponding standards, so the developer Shanshui Wenyuan Kaiya Real Estate Development Co., Ltd. was ordered to repair according to the relevant national standards, and compensated Ms. Zhang for the loss of more than 160,000 yuan.

In June 2010, the owner of the Panhai International Residential Area in Chaoyang District reported that there were problems with the quality of fine decoration in the Panhai International Residential Area, such as marble cracking, chromatic aberration and color spots.

In May 2010, Yuefu's high-end residential delivery, the living room and kitchen floor is about 60 square meters, and the marble cracked area is as high as 70%.

Developers should choose qualified marble

Marble has natural defects, which can easily cause marble cracking when subjected to external forces. Some marbles have many natural defects, such as cracks, sand holes, loose, and sandwiches. If these defects are not repaired and compensated in advance, they will be the first to cause lesions and damage in the defective parts and then spread after being wet and contaminated on the ground.

It is understood that China's evaluation standards for interior decoration marble are mainly based on GBT19766-2005 "Natural Marble Building Panels" published by China Standard Press. According to the relevant standards, the surface crack length of qualified marble shall not exceed 10 mm, and the color tone of the same batch of marble plates shall be basically adjusted, and the patterns shall be basically the same.

For natural marble building boards, the state does not have a standard classification of “quality”, but according to quality and other indicators, it can be divided into superior products, first-class products and qualified products. As far as the standard of qualified products is concerned, it is required that the marble does not allow cracks with a length of more than 10 mm, unless the marble of the special material itself has cracks, otherwise it is a substandard product.

Some varieties are not suitable for laying on the ground

On the stone side, the choice of marble laying leaves a problem. On the one hand, because of the choice of stone, it only pays attention to the color tone, and does not consider the difference in weather resistance and wear resistance between marble and granite.

Improper construction and protection lead to cracking

Improper construction techniques, materials and formulas that are not up to standard, and short maintenance periods have all led to empty marble floors.

After the marble plate is laid, because the plate and the bonding layer, or the bonding layer and the base layer are not densely bonded, we call it an empty drum. Empty drums will cause the "breathing" effect of the loose corners of the stone, reduce the bearing capacity of the ground stone, leave the locals, and suffer from excessive pressure when moving objects, which is prone to stone rupture. Settling and tearing of the foundation part of the ground can also cause cracking of the ground stone.

The wrong method of protection can also cause the marble to crack. For some owners and builders, although they have previously applied the protective agent to the marble, there is still a problem on the ground. This aspect is due to the fact that the cracks and loose parts of the stone are not well repaired, and the back of the stone is quickly destroyed by the large water pressure caused by the moisture. On the other hand, although the front side of the marble is also protected, the moisture on the back side will enter the interior of the stone along the cracks and loose parts of the stone, which will increase the humidity of the stone, thereby forming a vicious circle.

Engineering projects need to be fully controlled

The marble of the hardcover building has cracked, not only the quality of the stone itself, but also the problem of improper construction of the developer. Therefore, the control of stone quality should be controlled from the factory selection, processing, transportation, acceptance, handling, and on-site care.

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