SU1291870A1 - Device for investigating strength properties of concrete - Google Patents

Abstract

The invention relates to the study of the strength properties of materials, mainly concretes. The aim of the invention is to increase the informativeness of the study of concrete by determining the strength properties, as well as determining the content of coarse aggregate in the original concrete. The housing 1. of the device is made in the form of a stack with inclined shelves 2. The latter consist of a vibrating channel with a bottom 5 and a longitudinal grate above it. Even-numbered: order shelves 2 are tilted oppositely odd, i. Between the shelves 2 mounted vi (roplits 7, hingedly hanging I to the bottom 5 of the overlying vibros WITH

Description

trays and inclined towards the underlying in the same direction. Under the lower shelf, made in the form of a grille 9, there is a screening unit 10 in the form of a block of sieves. Case 1 is fixed on the vibrating table 15. Under the action of vibration of the case 1, fragments of material (concrete) 16 are destroyed step by step on the grids 6

The invention relates to the study of materials by determining their physical properties, namely, devices for studying the strength properties of concrete or similar multiphase structures, and can be used in the field of quality control of construction and installation works, laboratory and research practice in construction and mining. business

The purpose of the invention is to increase the information content of the study.

Fig, 1 shows a structural diagram of the proposed device; in: FIG. 2 is a section A-A in FIG. one; FIG. 3 is a section BB in FIG. 1. FIG. 4 knot of fastening of grid-irons and vibrating plates to the wall of the stack.

Case 1 (Fig. 1) of the proposed device is made in the form of a shelf with inclined shelves 2 sandwiched between the walls 3 with the help of stitch 4 "Each of the shelves is made in the form of a vibrating channel with a bottom 5 and a longitudinal collar 6 above the bottom. Even-numbered shelves are tilted oppositely odd. Rigid vibrating plates 7 are mounted between each two shelves in the housing, each of which is pivotally suspended from the bottom 5 of the underlying vibrating channel (Fig. 4) and inclined to the underlying side (Fig. 1).

The upper and lower inclined shelves are made in the form of gratings 8 and 9 without bottoms, and under the lower shelf, a screening unit 10 is built in the form of a block of test sieves or a tray for collecting and subsequent screening on an independent unit of screening. The hinged suspension of the vibrating plates to the shelves is carried out by means of axles 11 (Fig. 4)

shelves 2 under the blows of vibrating plates 7. The cleaned grains of a large aggregate of concrete are unloaded from the last shelves 2, the grids 6 of which are brought out. The fine-grained mass from under the grille 9 of the lower shelf is collected and dispersed in the sieve of the sieving unit 10 for further analysis. 4 il.

Walls 3 can be lined with wear-resistant sheets 12. Shelves 2 in the overload zones are provided with fender visors 13. Walls 3 with flanges 14

mounted to bros stol 15 or shake table. The width of the cells of the screening elements of the device is progressively reduced from the upper to the lower shelves. FIG. 1, the arrows indicate the directions of movement of the material under study, starting with a fragment of material 16 on the upper shelf.

The device works as follows.

Fragments of the material under study 16 are placed on the upper shelf of the device rigidly mounted on the vibrating table 15. Under the action of vibration, the fragments of material roll, sift, move from the shelf to the shelf, and are crushed under the impacts of the vibrating plates 7. Sufficiently crushed by vibrating plates 7 on the grate 6

fragments of material 16 pass through the bottoms 5 of this shelf without regrinding, entering the next shelf, etc.

The frequency, amplitude of oscillation and mass of the vibrating plates 7 are selected from the condition that the impact energy is sufficient to destroy fragments of the material under study, mainly heavy concrete, and insufficiently to destroy the grains of a large aggregate.

From the last shelves 2, the grilles of which are brought out, the aggregate which is sufficiently cleared from the mortar component is unloaded.

From under the bottom shelf-lattice 9, the fine-grained mass is collected and dispersed in the sieves of the control sieving unit 10. Analyzing the grain composition of the product, investigating the correlation of indicators of concrete strength.

The high level of mechanization and ease of maintenance increase the efficiency of the research process. In addition, the data input not only on the strength properties, but also on the content of a large aggregate in the initial concrete increases the information content of the study.

Claims (1)

Claims, Device for investigating the strength properties of concrete, including a case in the form of a stack with inclined shelves and a sieving unit, which is designed so that, in order to increase the information content, it is equipped with rigid plate plates installed between the shelves; and each of the latter is made in the form of a vibratory flow with a longitudinal grate above its bottom, and even for even d shelves tilted oppositely odd, and each vibrating plate is hinged. It is suspended to the bottom of the vibrating channel, you :: are a shelving shelf and inclined towards the lower; lying in the same direction. A- / a 9 15 70 (ri & Editor I. Derbak Compiled by G. Martynov Tehred L. Oleynik Proofreader And; Erdei Order 225/42 Circulation 777 Subscription VNISTI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. 4/5 Production and printing company, Uzhgorod, st. Project, 4