RU2384676C1 - Composite reinforcement (versions) - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention concerns construction specifically composite reinforcement. Composite reinforcement comprises bearing rod of high-strength polymer material and winding with winding cords and tapes of threads; cords; tapes of threads, surface relief of which is created by winding of one or opposite direction, beside, relief of rod surface is created with winding cords and tapes of threads, or cords, or tapes of threads of multiple-turn winding of various areas of sections and pitches, besides pitch of multiple-turn winding equals sum of pitches of various winding turns, and ratio of winding cords and tapes section areas are within the limits from 1.01 to 250.

EFFECT: production of composite reinforcement.

6 cl, 6 dwg

Description

The invention relates to construction, namely to composite reinforcement, which is used in building structures: for reinforcing monolithic concrete and prefabricated buildings; for use in structural elements of buildings in the form of separate rods; for the manufacture of heat-insulating wall panels; for reinforcing concrete products (slabs, foundations) working on an elastic foundation; for soil reinforcement of the foundations of buildings and structures, including the foundations of motorways and roads; for reinforcing asphalt roads; for anchoring in the ground retaining walls and structures.

Known reinforcing element containing a rod of high-strength polymer material and a winding with ledges (Frolov V.P. Fiberglass reinforcement and glass-concrete structures. M., Stroyizdat, 1980, p.20-27).

The disadvantage of such a reinforcing element is the low degree of adhesion to concrete.

Known fiberglass reinforcement according to patent RU 2194135 (publ. 10.12.2002), containing a supporting rod of high-strength polymer material and a winding with ledges, which are made in the form of a bundle of threads, impregnated with a binder and spirally applied with an interference fit equal to 1 / 2-1 / 10 the diameter of pressing the tow into the surface of the supporting rod, and the diameter of winding the tow is up to 2d, where d is the diameter of the supporting rod, while the core can be equipped with a second strand of threads with the opposite direction of winding to the first, and can also be made from a back -trivial grooves alternating with benches.

The disadvantage of such reinforcement is the low degree of adhesion to concrete.

Known fiberglass reinforcement according to the patent for PM RU 77310 (publ. 20.10.2008), containing a supporting rod of high-strength polymer material and a winding made of braids or a winding tape of one or the opposite direction of winding, and the ratio of the areas of the winding bundle and the winding tape is in the range from 1 to 150.

The disadvantage of such reinforcement is the low degree of adhesion to concrete.

To achieve the specified technical result in composite reinforcement containing a supporting rod of high-strength polymer material and winding with bundles and ribbons of threads; harnesses; ribbons, the surface relief of which is created by a winding of one or the opposite direction, and the surface relief of the rod is created by winding bundles and ribbons of threads; harnesses; ribbons of threads of multiple windings of various cross-sectional areas and steps, and the step of multi-starting winding is equal to the sum of the steps of different approaches of winding, and the ratio of the cross-sectional areas of winding bundles and tapes is in the range from 1.01 to 250.

The armature contains a supporting rod of high-strength polymer material and a winding.

According to option 1, bundles and ribbons of threads, the surface relief of which is created by a winding in the opposite direction, and the surface relief of the core is created by winding bundles and ribbons of threads of multiple windings.

According to option 2, bundles and ribbons of threads, the surface relief of which is created by a winding in one direction, the surface relief of the core is created by winding bundles and ribbons of multi-thread windings.

In option 3, ribbons of threads, the surface relief of which is created by a winding in the opposite direction, the surface relief of the core is created by winding ribbons of multi-thread windings.

According to option 4, ribbons of threads, the surface relief of which is created by a winding in one direction, the surface relief of the core is created by winding ribbons of multi-thread windings.

According to the 5th option, winding with strands of threads, the surface relief of which is created by windings of the opposite direction, the surface relief of the core is created by winding bundles of threads of multi-thread winding.

According to the 6th variant, strands of threads, the surface relief of which is created by a winding of one direction, the surface relief of the core is created by winding bundles of threads of multi-thread winding.

Thanks to these features, a new type of composite reinforcement has been created, which has increased adhesion to concrete.

Composite fittings are made by the method of longitudinal drawing of the fibers of the supporting rod with multi-helical spiral winding of ledges of various sizes from high-strength polymer material (glass, basalt, carbon and other fibers) impregnated with an epoxy compound based on ED-20 resin with a hardener. After curing, the resulting rod is cut into pieces of the required length. The method of producing reinforcement is simple, technological, does not require the development of special equipment and does not require additional capital costs.

The invention is illustrated by drawings.

Figure 1 shows a four-way composite reinforcement with a surface relief created by winding bundles and ribbons of threads of the opposite direction of winding.

Figure 2 shows a four-way composite reinforcement with a surface relief created by winding bundles and ribbons of threads of one direction of winding.

Figure 3 shows a four-way composite reinforcement with a surface relief created by winding ribbons of threads of the opposite direction of winding.

Figure 4 shows a four-way composite reinforcement with a surface relief created by winding tapes of threads of one direction of winding.

Figure 5 shows a four-way composite reinforcement with a surface relief created by winding bundles of threads of the opposite direction of winding.

Figure 6 shows a four-way composite reinforcement with a surface relief created by winding bundles of threads of one direction of winding.

In the reinforcement depicted in figure 1, the surface relief of the rod is created by winding ropes and tapes of the opposite direction of winding.

The composite reinforcement comprises a supporting rod 1 (Fig. 1) of high-strength polymer material (for example, fiberglass, basalt fiber) and spiral windings of opposite directions, made of the same fibers and impregnated with an epoxy compound. The windings 2, 3, 4, 5 are simultaneously applied to the rod 1, i.e. made by multiple start. The parameters of the bundles and tapes of these windings and the application step are different. The windings 6, 7, 8, 9 are also made multi-start, but in the opposite direction of winding. The parameters of the tapes of these windings and the application step are also different.

In the reinforcement depicted in figure 2, the surface relief of the rod is created by winding ropes and tapes of the same direction of winding. The winding 10 is made of a bundle, and the windings 11, 12, 13 are made of tapes. The parameters of the tapes and the step of their application are different.

In the reinforcement depicted in figure 3, the surface relief of the rod is created by winding tapes of the opposite direction of winding. The windings 14, 15, 16, 17 of one direction and the windings 18, 19, 20, 21 of the opposite direction of winding are made of ribbons of threads of different sizes and applied with different increments.

In the reinforcement depicted in figure 4, the surface relief of the rod is created by winding tapes of one direction of winding. The windings 22, 23, 24, 25 are made of ribbons of threads of different sizes and are applied in different increments.

In the reinforcement depicted in figure 5, the surface relief of the rod is created by winding bundles of the opposite direction of winding. The windings 26, 27, 28, 29 of one direction and the windings 30, 31, 32, 33 of the opposite direction of winding are made of bundles of threads of different sizes and applied with different pitch.

In the reinforcement depicted in Fig.6, the surface relief of the rod is created by winding bundles of one direction of winding. The windings 34, 35, 36, 37 are made of bundles of threads of different sizes and applied with different pitch.

Comparative tests were carried out to determine the adhesion to concrete of basalt-plastic reinforcement with an outer diameter of 8 mm for various types of relief. The range of applicability of the relief embodiments is determined by the ratio of the cross-sectional areas of the windings — coefficient “K”. K = F _max / F _min ,

where F _max - the maximum cross-sectional area of the winding cord or tape;

F _min - the minimum cross-sectional area of the winding cord or tape.

Adhesion to concrete was determined by the efforts of pulling out reinforcement options from cement-sand castings of the M100 brand with a casting length of 100 mm. The table shows the specific values of the pulling force (clutch) per unit length of reinforcement A = N / mm.

In the first embodiment, the reinforcement according to the prototype had a single-start winding from a basalt tow with a diameter of 3 mm with a pitch of t = 15 mm, and A = 62 n / mm.

In the second embodiment of the reinforcement, the winding is made of four-starting from bundles and tapes of the opposite direction of winding. The tow is 2.5 mm in diameter, the cross-sectional area of the tow is 4.9 mm ² . Tape (0.5 × 10) mm, cross-sectional area 5 mm ² , A = 78 N / mm, K = 1.02.

In the third embodiment of the reinforcement, the winding is made of four-starting from bundles and tapes of the same direction of winding. A bundle with a diameter of 3 mm, a cross-sectional area of 7.065 mm ² , a tape (0.1 × 3) mm, a cross-sectional area of 0.3 mm ² , A = 84 N / mm, K = 23.5.

In the fourth embodiment of the reinforcement, the winding is made of four-starting from tapes of the opposite direction of winding. Tape (0.5 × 10) mm, cross-sectional area 5 mm, (0.1 × 3) mm, cross-sectional area 0.3 mm ² , A = 80 N / mm, K = 16.6.

In the fifth embodiment, the reinforcement is made of four-way tapes of the same direction of winding. Tapes (3 × 10) mm, cross-sectional area 30 mm, (0.1 × 3), cross-sectional area 0.3 mm ² , A = 88 N / mm, K = 100.

In the sixth embodiment, the reinforcement is made four-way from the bundles of the opposite direction of winding. A tourniquet with a diameter of 3 mm, a cross-sectional area of 7.065 mm ² , a tourniquet with a diameter of 0.2 mm, a cross-sectional area of 0.031 mm ² , A = 92 N / mm, K = 227.9.

In the seventh embodiment, the reinforcement is made of four-way from the bundles of one direction of winding. A tourniquet with a diameter of 3 mm, a cross-sectional area of 7.065 mm, a tourniquet with a diameter of 0.18 mm, a cross-sectional area of 0.025 mm ² , K = 282.6, Breakage of a winding thread.

The test results are shown in the table.

example TO BUT note one - 62 2 1,02 78 Excessive reinforcement diameter over tolerance 3 23.5 84 four 16.6 80 5 one hundred 88 6 227.9 92 7 282.6 - Winding thread break

The range of applicability of the reinforcement according to the ratio of the cross-sectional area “K” of the spiral windings is in the range from 1.02 to 227.9.

When K <1.02, the outer diameter of the reinforcement increases significantly at the intersection of the windings of opposite directions.

At K> 227.9, a thin winding bundle breaks in the net wrapper due to its low strength.

The proposed reinforcement composite with a variable value of screw protrusions formed by multi-winding of winding bundles, tapes in different combinations of cross-sectional areas and winding steps of one and the opposite directions increases the adhesion of the reinforcement to concrete, which, in turn, increases the bearing capacity of building structures.

Claims (6)

1. Composite reinforcement containing a supporting rod of high-strength polymer material and winding with bundles and ribbons of threads, the surface relief of which is created by windings of the opposite direction, characterized in that the surface relief of the rod is created by winding bundles and ribbons of threads of multiple windings of various sections and steps, and the step multi-start winding is equal to the sum of the steps of different approaches of winding, and the ratio of the cross-sectional areas of the winding harnesses and ribbons is in the range from 1.01 to 250. 2. Composite reinforcement containing a supporting rod of high-strength polymeric material and winding with strands and ribbons of threads, the surface relief of which is created by a winding of one direction, characterized in that the surface relief of the rod is created by winding ropes and ribbons of threads of multiple windings of various sections and steps, and the step multi-start winding is equal to the sum of the steps of different approaches of winding, and the ratio of the cross-sectional areas of the winding harnesses and ribbons is in the range from 1.01 to 250. 3. Composite reinforcement containing a supporting rod of high-strength polymeric material and winding with thread tapes, the surface relief of which is created by a winding of the opposite direction, characterized in that the surface relief of the core is created by winding ribbons of threads of multiple windings of different cross-sectional areas and steps, and the step of multi-starting winding is equal to the sum steps of different approaches of winding, and the ratio of the cross-sectional areas of the winding tapes is in the range from 1.01 to 250. 4. Composite reinforcement, comprising a bearing rod made of high-strength polymer material and winding with ribbons of threads, the surface relief of which is created by a winding of one direction, characterized in that the surface relief of the rod is created by winding ribbons of threads of multiple windings of different sections and steps, and the step of multiple winding is equal to the sum steps of different approaches of winding, and the ratio of the cross-sectional areas of the winding tapes is in the range from 1.01 to 250. 5. Composite reinforcement containing a supporting rod of high-strength polymeric material and winding with strands of threads, the surface relief of which is created by windings of the opposite direction, characterized in that the surface relief of the core is created by winding strands of multi-thread windings of different cross-sectional areas and steps, and the step of multi-thread winding is equal to the sum steps of different approaches of winding, and the ratio of the cross-sectional areas of the winding harnesses is in the range from 1.01 to 250. 6. Composite reinforcement containing a supporting rod of high-strength polymeric material and winding with strands of threads, the surface relief of which is created by a winding of one direction, characterized in that the surface relief of the rod is created by winding strands of multi-thread windings of different cross-sectional areas and steps, and the multi-thread winding step is equal to the sum steps of different approaches of winding, and the ratio of the cross-sectional areas of the winding harnesses and ribbons is in the range from 1.01 to 250.

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