CN101418539B

CN101418539B - Roadbed cloth

Info

Publication number: CN101418539B
Application number: CN200810236236XA
Authority: CN
Inventors: 宣维栋; 史建军; 方文叶; 居云龙; 黄子伟
Original assignee: TIANMO GROUP CO Ltd CHANGZHOU
Current assignee: Changzhou Tianma Group Co., Ltd. (former building material 253 factory)
Priority date: 2008-11-27
Filing date: 2008-11-27
Publication date: 2012-02-01
Anticipated expiration: 2028-11-27
Also published as: CN101418539A

Abstract

The invention discloses a substrate cloth for a road. The substrate cloth is prepared through mixing fiberglass and polyester fiber according to weight ratio of 6-8 to 4-2. The tensile and breaking strength of the substrate cloth for the road is between 8 and 10 kN/m; and the extension rate is less than 3 percent. The fiberglass and the polyester fiber are chopped into sections with length of between 12 and 18 mm and are evenly dispersed in an adhesive system to form mixed fiber; the adhesive system mixed with the fiber is sprayed on a net belt; and the net belt is conveyed to a drying room and is dried and is finally subjected to furling and edge cutting to obtain the substrate cloth. The substrate cloth for the road has high tensile and breaking strength and low extension rate and is suitable for modifying a cement road into an asphalt road.

Description

Roadbed cloth

Technical field

The present invention relates to a kind of non-weaving cloth, be specifically related to a kind of roadbed cloth that is used for cement pavement is changed into flexible pavement.

Background technology

The damage that cement pavement is in use occurred mainly shows as crack, depression, serious crushing shell, the fracture of plate angle, deposition, faulting of slab ends, joint filler breakage etc.; Cement pavement for routine; The reason that causes the road surface to damage is because the control of water is not enough, the roadbed soil property is poor, roadbed groundwater table height, settlement of subgrade, sub-surface and surface layer strength deficiency, the effect of overweight load and the defective of design and construction etc.; Often in the not oversize time, to carry out a large amount of maintenances; And the cost of safeguarding is much bigger more than flexible pavement, and the transformation of therefore the extensive cement pavement that keeps in repair of needs being carried out flexible pavement is to solve the excessive a kind of effective ways of maintenance cost.

It is that cement pavement is dug totally completely that the traditional cement road surface changes flexible pavement into, lays according to the paving mode of flexible pavement again, so not only long in time limit, and causes waste serious, also bigger to the infringement of environment.If directly on cement pavement, lay bitumen layer, then because the coefficient of thermal expansion of two kinds of base materials inconsistent tends to cause the damage in advance of asphaltum concrete cover-layer, this just need re-lay one deck Pei Jibu on cement pavement.

But the tensile break strength of present existing roadbed cloth has only about 4kN/m, and elongation per unit length is then greater than 3%.And the weak point of making glass fiber and the polyester fiber of usefulness cuts length all about 30mm, makes that like this uniformity of felt face is not high, influences functional performance.

Summary of the invention

The objective of the invention is to overcome the problems referred to above, the roadbed cloth that a kind of tensile break strength is high, elongation per unit length is low is provided.

The technical scheme that realizes the object of the invention is: a kind of roadbed cloth, by glass fiber and polyester fiber according to 6～8: 4～2 weight ratio is mixed and made into; The tensile break strength of this roadbed cloth is 8～10kN/m, and elongation per unit length is less than 3%.

Said glass fiber and said polyester fiber are all short be cut into 12mm～18mm after; Be dispersed in and form composite fibre in the adhesive system; The adhesive system that will contain composite fibre then sprays on the guipure, is transported to the drying room oven dry again, and last rolling is cut edge and processed.

Said glass fiber is the high-strength water wire drawing of alkali-free, and the weight of its surface conditioning agent accounts for 0.01%～0.1% of glass fiber gross weight.

Said polyester fiber is the modified polyester fiber that handled through silane coupler on the surface, and the weight of silane coupler accounts for 0.01%～0.1% of polyester fiber gross weight.

Said adhesive system is a plain edition, is promptly mixed by acrylic acid, wood glue and the silane coupler weight ratio according to 20: 78: 2.

Said adhesive system is high strong type, is promptly mixed by acrylic acid, urea aldehyde and the silane coupler weight ratio according to 20: 78: 2.

Said adhesive system is a soft type, is promptly mixed by acrylic acid and the silane coupler weight ratio according to 98: 2.

The present invention has positive effect: (1) the present invention is mixed and made into Pei Jibu with polyester fiber and glass fiber; The tensile break strength of the Pei Jibu that this method obtains can reach 8～10kN/m; Elongation per unit length then is lower than 3%, makes reinforcement and waterproof action more remarkable like this, is fit to the anticracking on road surface.(2) glass fiber used in the present invention and polyester fiber are the short short glass fiber that is cut into 12～24mm and cut polyester fiber with short, and such length has increased the dispersive property of fiber, has improved the compactness and the felt surface uniformity of felt.What (3) glass fiber of the present invention adopted is < the high-strength water wire drawing of 0.1% alkali-free of surfacing agent content; It had both satisfied weak point and had highly necessary asked; Can satisfy requirement of strength again, the silane coupler that contains in surface conditioning agent silane coupler in the employed adhesive system when becoming felt is complementary.(4) polyester fiber of the present invention is the modified polyester fiber that handle through silane coupler on the surface, its have be uniformly dispersed, the characteristics of the group of rising not, and be out of shape not having below 240 ℃, do not shrink.

The specific embodiment

(embodiment 1)

The roadbed cloth of present embodiment be earlier with glass fiber and polyester fiber all lack be cut into 12mm after; The weak point of getting short glass fiber and the 40kg of 60kg is cut polyester fiber and is dispersed in and forms composite fibre in the adhesive system; The adhesive system that will contain composite fibre through spray system sprays on the guipure; Dried to drying room by mesh-belt conveying then, last rolling is cut edge and is processed.

The glass fiber that present embodiment adopted is the high-strength water wire drawing of alkali-free; Its single fiber diameter is 13 μ m, and alkali metal oxide content is less than 0.8%, and its surface conditioning agent is made up of silane coupler, sliding agent and film forming agent; The optional paregal O of sliding agent, the optional APR resin of film forming agent; Weight ratio between silane coupler, sliding agent and the film forming agent is 1: (0.8～1.2): (0.8～1.2).The weight of surface conditioning agent accounts for 0.01%～0.1% of glass fiber gross weight.The polyester fiber that is adopted is the modified polyester fiber that the surface applies through silane coupler, and the weight of silane coupler accounts for 0.01%～0.1% of polyester fiber gross weight.The adhesive system that is adopted is plain edition adhesive system that to be the acrylic acid of 50wt%, wood glue that content is 50wt% and silane coupler by content mix according to 20: 78: 2 weight ratio.

During concrete the use; Earlier cement pavement is cleaned up; Lay this roadbed cloth of one deck then, carry out the laying of flexible pavement again, can effectively prevent like this because the inconsistent reflection crack that causes of coefficient of thermal expansion; The bonding force of refinforced cement road surface and flexible pavement prevents the infringement to roadbed of layering and water damage simultaneously.

(embodiment 2～embodiment 9)

Each embodiment and embodiment 1 are basic identical, and difference is to see table 1.

For the adhesive system of the high strong type lifted in the table, it is, and to be the acrylic acid of 50wt%, urea aldehyde that content is 50wt% and silane coupler by content evenly mix according to 20: 78: 2 weight ratio.

For the adhesive system of the soft type lifted in the table, it is to be that acrylic acid and the silane coupler of 50wt% evenly mixes according to 98: 2 weight ratio by content.

Table 1

Claims

1. roadbed cloth is characterized in that: by glass fiber and polyester fiber according to 6～8: 4～2 weight ratio is mixed and made into; The tensile break strength of this roadbed cloth is 8～10kN/m, and elongation per unit length is less than 3%; Said glass fiber and said polyester fiber are all short be cut into 12mm～18mm after; Be dispersed in and form composite fibre in the adhesive system; The adhesive system that will contain composite fibre then sprays on the guipure, is transported to the drying room oven dry again, and last rolling is cut edge and processed.

2. roadbed cloth according to claim 1 is characterized in that: said glass fiber is the high-strength water wire drawing of alkali-free, and the weight of its surface conditioning agent accounts for 0.01%～0.1% of glass fiber gross weight.

3. roadbed cloth according to claim 1 is characterized in that: the modified polyester fiber that said polyester fiber was handled through silane coupler for the surface.

4. roadbed cloth according to claim 1 is characterized in that: said adhesive system is mixed by acrylic acid, wood glue and the silane coupler weight ratio according to 20: 78: 2.

5. roadbed cloth according to claim 1 is characterized in that: said adhesive system is mixed by acrylic acid, urea aldehyde and the silane coupler weight ratio according to 20: 78: 2.

6. roadbed cloth according to claim 1 is characterized in that: said adhesive system is mixed by acrylic acid and the silane coupler weight ratio according to 98: 2.