Crowfoot Wrench

Crowfoot Wrench
Crowfoot Wrench Crowfoot Wrench

Resolution: decorative stone pollution causes and treatment - stone, decorative stone, stone pollution - Building Materials Industry

I. Analysis of the causes of pollution in stone

For stone curtain wall construction the reason for the piebald, water stains, yellow rust, etc. There is currently used for exterior wall decoration of the stone, the basic construction techniques are used hanging, was the result of pollution phenomenon, there are many reasons. First of all, whether granite or marble, as there are some small stone pores. When in the course of construction or installation is completed, do not do a very good protective treatment, the rocks are iron to ferrous iron usually exists, but the ferrous iron is unstable, and react with oxygen in the air, change for the ferric form of iron oxide, which is rust. Stone color difference occurred mainly in the chemical stability of stone varieties, will appear during the installation process gradually turn yellow stone walls from top to bottom, over time, the whole wall completely yellow, in the natural environment such as acid rain and snow substances and in the air such as sulfur dioxide and other corrosive gas attack, the stone surface pollutants caused by corrosion and contamination.

II secondary prevention treatment Stone pollution control to prevent the first from the staff, by brushing stone protection (curing) agent approach, eliminate the phenomenon of stone disease. Stone Protectant is like giving a shot, stone surface, brush the curing agent, equivalent to put a layer of invisible garments, you can prevent pollution of the invasion. There are many types of curing agents, to different species and parts of stone, choose a different formulation of the curing agent.

Hanging wall or stone technology. Contamination in natural stone over man-made factors, dust, rain water is stone appears the main reason for rust spots. So, then select the repellant should be chosen with water and oil and pervasive feature of the product.

If the investment unit of the original decoration in the building when the first, to recognize this, moderate increase in investment in some of curing agent, will be a multiplier effect. Compared with the second into the future to the cost of pollution, about five times the gap. Moreover, investment units and project supervisory units should be strictly stone construction technology, often in order to drive the construction schedule and quality and process deregulation.

A successful stone protection in mind, one stone dried; second curing agent injection rate; Third, the conservation cycle; Fourth, rolling, brushing, spraying, wiping must be uniform. As long as these four points, the basic building stone walls can be eliminated stone surface when it rains, "Pan-flowers" phenomenon, but the construction method is also very important. Major should note the following:

1, rushing home from work when the stone must be completely dry, the moisture content should not be greater than the national standard. Have collapsed edge off angle, cracks, voids, etc. should be repaired, and meet construction requirements (except for special requirements), the to be constructed.

2, stone must be clean. Before the construction of the surface protection should be floating ash, slag cement, glue, wax and other dirt to clean up. If the dirt has penetrated within the stone, you can use special cleaning agents to clean. (Please check or search for Shanghai Grace AC protection Protection Co., Ltd. Shanghai Grace Stone Company News) shall not use non-stone-specific cleaning detergent, avoid use because of improper cleaning agents deepen the color of stone there, a large area of the situation back to yellow.
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What are crowfoot wrenches for?

A 3/8 - 1/2 drive crows-foot end wrench (various sizes) is snapped on an extension and turned with a ratchet. It's used where external clearance won't allow you to swing an open or box-end wrench to tighten or loosen a hex bolt or nut.