SU710805A1 - Method of making complex members - Google Patents

Description

(54) METHOD OF MANUFACTURING 5 COMPLEX ELEMENTS

The invention relates to a process for the manufacture of corrosion-resistant complex elements intended for the construction of industrial buildings and structures with highly corrosive environments.

There is a known method of manufacturing complex building elements, which includes the homonolation of kelezobetonnye cores by vibrating it into a mold with a uniformly laid mixture on a pallet 1J.

The disadvantage of this method is the relatively large cycle of manufacturing products, in particular, the increased period of hardening of polymer concrete and its reduced crack resistance.

The purpose of the invention is to reduce the curing time of polymer concrete.

It is achieved by the fact that the method of manufacturing complex elements, which includes monolithing of reinforced concrete cores by vibrating it into a mold with a uniformly compacted mixture on a pallet, the core is heated to t 60-80 ° C before being immersed in a forchg, and the demolding is done after 3-5 hours excerpts without late heat treatment.

The method of manufacturing complex elements is carried out as follows. Pre-made reinforced concrete or composite rigid cores. Reinforced concrete cores are produced by conventional technology by concreting reinforced frameworks with cement concrete on dense or porous aggregates. Composite cores are made according to the method illustrated by the attached drawings.

FIG. 1 depicts hard arm pads and a particularly light core; in fig. 2 and FIG. 3 - combined compound

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core and its cross section; in fig. 4 and fng. 5 - respectively, the moment of the vibrating of the composite core into the polymer mixture and the finished product (up to the axis of symmetry). The hard composite core armovkladyshi 0 - 1 combined with especially,; 1egkim core 2, made for example of drevopolimerbetona by fibropolimernoy mastic poniepe4HoA 3 and 4. In the working reinforcement armovkladyshah use high strength cement concrete marks 400-600, and core drevonolimerbetonnom - ultralight polymer concrete with a volume weight of 150-450 kg / m, enclosed in a trellised wooden frame made of low-grade wood.

The finished composite cores are heated with hot air up to t 60-80 ° C and vibrate into plasticized polymer concrete mix 5, laid evenly On a flexible sheet substrate in a special form 7. Preheating heating of the core is necessary in order:

First, to ensure the subsequent simultaneous accelerated hardening with the polymer concrete until the form-breaking strength of all the concrete constituting the product;

- secondly, with the increased core sizes, to ensure maximum reduction of temperature-shrinkage stresses in the polymer-concrete casing of finished products;

Thirdly, to exclude the subsequent heat treatment of finished products, leading in most cases to the appearance of shrinkage cracks in lengthy structures and to their subsequent rejection.

To reliably eliminate shrinkage cracks, the molded article in the mold also provides flexibility as the polymer concrete hardens and the entire structure cools.

When using preheated cores, the molded complex elements decompose in 3-5 hours without subsequent heat treatment.

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Experimental testing and practical implementation of the method under factory conditions showed that the products made according to the method described above are distinguished by an increased quality of the arm-polymer polymer concrete sheath, as well as higher crack resistance, rigidity and strength. This achieves a significant reduction in time and a reduction in the labor intensity of manufacturing the elements. The resulting complex elements of high quality and full factory readiness can be successfully applied to those responsible. bearing structures of buildings and structures with highly aggressive media. .

Claims (1)

Invention Formula A method of manufacturing complex elements, including the homing of reinforced concrete cores by vibrating it into a mold with a uniformly laid mixture on a pallet, characterized in that, in order to shorten the curing time of polymer concrete, the core is heated to t 60-80 ° C and the stripping is produced after 3-5 hours of exposure without further heat treatment. Sources of information taken into account in the examination 1. USSR author's certificate No. 467826, cl. B 28 B 11/00, 1972 (proto type of). : "| T about. - T . . | -. . .- .. ... M fieu. .}