BG1480U1 - A bitumen compound for filling and sealing joints - Google Patents

Abstract

The useful model is related to a bitumen compound for filling and sealing joints. It is used in jointing asphalt and concrete pavements, preventing the access of water and harmful substances. The compound resists temperature changes, ageing, and hardening

Description

The utility model relates to a bituminous composition for filling and sealing joints, in particular for use in the grouting of asphalt and concrete flooring.

BACKGROUND OF THE INVENTION

When laying pavements such as asphalt, street slabs, pavers, blocks and other concrete, it is necessary to fill and seal joints. Road surfaces are exposed to heavy traffic, different atmospheric conditions (ice, rain, heat), harmful substances (such as fuels, etc.), which require grouting mixtures to meet different requirements. Due to their strength, elasticity and density for jointing road surfaces, bitumen based materials mixed with various ingredients have been widely used to improve their performance.

HU 41432 proposes to use condensed linear polyamines and fatty acids in bituminous mixtures to fill and seal joints on concrete and asphalt to improve adhesion and elasticity.

JP 62280282 proposes to improve the adhesion, water resistance and resistance to abrupt temperature changes of bituminous mixtures for the filling and sealing of joints on concrete and asphalt pavements, the use of epoxy modified urethane resin additives and a method for producing them.

WO 2010119123 A1 provides a special method for the production of fragmentary material formed from at least an elasto-plastic binder based on natural, modified or synthetic bitumen for joint filling. EP 0329836 describes a bitumen composition based on bitumen, a polyolefin and a thermoplastic elastomer comprising at least two polymer blocks, one of which is a crystalline polymer block and the other an amorphous polymer block, for improving low temperature elasticity and high temperature resistance.

US 3978014 provides a bituminous composition comprising a block copolymer, preferably a listirene-polyalkadiene-polystyrene; and a second thermoplastic polymer.

US 4282127 offers a triple blend of bitumen, polyolefin and butadiene styrene copolymer.

It is evident that due to the numerous and varied requirements for road jointing materials, the need to create new materials with improved performance is urgent.

The technical nature of the utility model

The bitumen composition for filling and sealing joints includes in%:

Bitumen category 100/150 89-95

Thermoplastic elastomer based on a linear block copolymer based on styrene and butadiene by weight. % styrene bound 4-9 Reactive elastomer terpolymer based on ethylene-butyl acrylate glycidyl methacrylate by weight. % butyl acrylate and wt. % glycidyl methacrylate 0.2-1.5 Polyphosphoric acid concentrate 0.05-0.1

The bitumen composition for filling and sealing joints is obtained by loading the required amount of bitumen in a tank (II), and then transferred through a mill to check the pipelines in another tank (I), which is actuated through the mill for stirring circulation. to check the bitumen pipelines, the required amount of the second constituent (thermoplastic elastomer) is added gradually with stirring, controlling the operation to avoid polymer buildup. The resulting mixture (bitumen and thermoplastic elastomer) is transferred to tank II through the mill with agitators turned on. The homogenization of said mixture is carried out either by repeatedly transferring it (eg 6 times) from one tank to the other through the mill with agitators included, finally remaining in tank I or alternatively the mixture is not transferred between tanks and remaining in tank I by circulating through the mill. with stirring (about 3.5 h). To the homogenized mixture is added a non-

1480 I bypass the amount of the third ingredient (reactive elastomer terpolymer) with stirring, controlling the operation to avoid polymer buildup. The mixture was transferred through the mill with the included pebbles in tank II and back as at the end when the mixture was in tank I, the mill was stopped and stirring continued for about 1.5 h. The required amount of poly-10 phosphoric acid concentrate was added to the resulting three-component formulation and the mixture was stirred for about 1 hour. Samples are taken for quality control. The finished product is packed.

The resulting bituminous composition is used for grouting asphalt and concrete pavements 15 by sealing joints by adhering to their surfaces, providing the necessary elasticity to absorb temperature expansions, preventing access to water and harmful substances. It is applied automatically, but in a homogeneous condition, which allows to maintain the thickness and width of the joint without smudging the remaining areas. It is resistant to temperatures below minus 2 ° C and higher juices than 35 ° C. The high elastic recovery and the high softening point of the bituminous composition do not allow the material to crack and break from the joints. It is resistant to the effects of harmful substances (for example fuels), its resistance to aging and hardening, facilitates the control of the opening of joints up to 35%. It is safe for the environment both in production and in working with it.

Exemplary Utility Model The following tables list some exemplary formulations illustrating preferred embodiments of the utility model and their corresponding technical characteristics. As bitumen, bitumen of category 100/150 was used as a thermoplastic elastomer based on a linear block copolymer of styrene and butadiene with 30 wt. % styrene bound, the product available on the market under the Kraton® D1192ES brand was used, and as a reactive elastomer a terpolymer based on ethylene butyl acrylate-glycidyl methacrylate of 20% by weight. % butyl acrylate and 9 wt. % glycidyl methacrylate (RET) Envaloy EP 4170 RESIN.

Table 1 - Exemplary formulations of bitumen composition

MATERIALS 1st COMPOSITION quantities (%) II COMPOSITION quantities (%) III COMPOSITION quantities (%) Bitumen category 100/150 94.70 92.51 90.42 Kraton D1192 ES thermoplastic elastomer 4.73 6.48 8.14 Reactive elastomer terpolymer (RET) ELVALOY 4170 RESIN 0.47 0.93 1.36 Polyphosphoric acid concentrate 0.09 0.09 0.09

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Table 2- Technical specifications of the formulations

No Parameter name Welsh unit Method on control 1st squad First composition 111th Chamber Requirements 1. Softening point, lirsten-ball method ° C BDS EN 1427 60 98 120 > 75 2. Penegration with a cone at 25 ° C 0,1 mm BDS EN 13880-2 35 50 65 40-100 3. Penetration and recovery (elasticity) at 25 ° C % BDS EN 13880-3 42 53 70 <60

Claims

Claims (2)

1. Bitumen composition for filling and sealing joints based on bitumen and elastomers, characterized in that it comprises, in%: bitumen category 100/150 89-95 thermoplastic elastomer based on a linear block copolymer of styrene and butadiene with 30 wt. % styrene bound 4-9 reactive elastomer terpolymer based on ethylene-butyl acrylate glycidyl methacrylate with 20 wt. % butyl acrylate and 9 wt. % glycidyl methacrylate 0.2-1.5 polyphosphoric acid concentrate 0.05-0.1 Bitumen composition according to claim 1, characterized in that it comprises in%: bitumen category 100/150 92.51 thermoplastic elastomer based on a linear block copolymer based on styrene and butadiene with 30 wt. 6.48 reactive elastomer terpolymer based on ethylene-butyl acrylate glycidyl methacrylate with 20 wt. % butyl acrylate and 9 wt. % g lycidyl methacrylate 0.93 polyphosphoric acid concentrate 0.09