Joints poured

Sulfur Cements Sulfur base cements are heated in a kettle similar to asphalts and joints poured hot, done in several steps to assure the joints are filled before cement cools below flowable temperature. Sulfur cements are plasticized using 0.6% olefin polysulfide (Thiokol ). Other plasticizers have been tried but none have proven as effective as the polysulfide. Sulfur cements are filled with either silica or carbon depending on exposure (carbon in the case of hydrofluoric... 

Vitrified-Clay Sewer Pipe This pipe is resistant to very dilute chemicals except hydrofluoric acid and is produced as standard-strength and extra-strength (ASTM C700). It is used for sewage, industrial waste, and storm water at atmospheric pressure. Elbows, Y branches, tees, reducers, and increasers are available. Assembly is by poured joints which allow for ample angular deflection. Joint com-... 

Many formulae have been suggested for cement using sulphur, e.g. sulphur and sand, sulphur bitumen and sand, etc. These materials are heated in a vat until molten and then poured into the joints where they set to a hard, strong solid. They are usually very brittle and contract considerably on cooling, which may give rise to cracks. They are, however, resistant to acid, water and dilute alkalis. 

As already pointed out, poured concrete is a good retarder for radon gas and soil gas. The major problems will be cracks, joints, and penetrations. The focus of this subsection will be on crack prevention and sealing joints and penetrations. A good deal of this material applies to both poured concrete and masonry walls. 

Avoid building blocks with interconnected internal cavities in basement walls. Basement walls made from in situ (poured) concrete are recommended. Concrete elements require careful and permanent sealing of all joints. Designs similar to swimming pools, manure tanks in agriculture and bomb shelters will provide a radon safe construction. 

Poured Joints Figure fO-139 illustrates a poured joint design. With regard to performance and ease of installation, most other joint... 

If a pour is to be halted either by operational problems or by design, the last layer placed before the interruption can be further retarded by the use of larger dosages of the admixture. This can eliminate the necessity for construction joints. The heavily retarded concrete can be horizontal in the placing of layers or vertical when a sloping layer of concrete should be left. 

In large pours where construction joints can be reduced thus speeding up construction. 

To Start the reaction, a very high temperature is needed, for which an ignition mixture has to be used. As the aluminum replaces the iron in the iron oxide, the molten iron produced by the fierce heat pours through a hole in the special container and runs into the casting mold, or into the joint in need of repair. 

The physical panel size used resulted in more joints between panels than would have been the case in a Portland cement pour, owing to the surface finishing with a screed and the continuous obstruction of the existing support columns. Asphalt expansion strips were placed between panels and were provided with a removable top strip which was filled with a polyurethane compound. Shrinkage of pours in this work was negligible. Shrinkage in sulfur concrete was proportional to the amount of sulfur binder used. 

Transfer the prepared fuming nitric acid into the flask of an apparatus for distillation in vacuum (Fig. 91). Coat all the ground-glass joints in the apparatus with moistened phosphoric anhydride or concentrated sulphuric acid. (When pouring over the nitric acid, be ca-... 

Assemble a setup as shown in Fig. 100. Lubricate the ground-glass joints with phosphoric acid. Displace the air from the setup with dry carbon dioxide. Pour 50 ml of absolute benzene into 250-ml... 

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