Secondly, the TLF solid waste powder upon mixing with hydrophobic bitumen, gets embedded or encapsulated and hence its contact with water is. The present invention provides a novel composition of slurry seal mix for road construction. The characterization of the novel composition for slurry seal mix is illustrated in table 1 below:. Table 1. Mix Design Criteria for Slurry Seal Mix The present invention further provides a process for the preparation of slurry seal mix,.
In another embodiment of the present invention the moisture content of the collagenous matter used may be in the range of 4.
In still another embodiment of present invention, the particle size of the aggregate may be. In yet another embodiment of present invention the mineral filler used may be such as.
Portland cement, calcium hydroxide, fly ash. In still another embodiment of present invention the polymer modified emulsion used may. In yet another embodiment, The term aggregate as used in this specification refers to broken stone aggregate passed through an aperture size of IS sieve 6. In a further embodiment, the present invention provides a composition that uses TLF solid waste powder in bitumen mix, thereby replacing the sand to certain level which to some.
Besides, the waste would bring extra revenue to the tanning industry. Hence, this process will have potential impact on the societal, economical and environmental development. In another embodiment, the present invention provides a composition of the slurry mix having the following combination:. Detailed description of the Invention:. Collagenous matter is subjected to mechanical treatment to adjust the fibre length in the range of 0.
It is cast into shape for using in road construction. The slurry seal exhibits the following characteristics. Moreover, the leather waste containing Slurry Seal mix of this invention does not require a chemical additive which is normally used to accelerate or retard the break-set time of the. Additionally, the leather waste as partial replacement for fine aggregate eliminates the use. Use of fibrous leather waste in novel Slurry Seal slurry formulation in an appropriate composition prevents the chromium leaching from the pavement preservation layer, by.
Inclusion of TLF fibres to an extend of up to 7. The presence of TLF also provides better cohesion and enhanced binder holding capacity due to its micro fibre nature and increased surface area and in this manner reduces wet. Incorporation of TLF fibre in the slurry seal mix permits extended mixing time, delays setting. The following examples are given by way of illustration of the present invention and therefore should not be construed to limit the scope of the present invention.
Aggregate 6. Example 1 The chrome shavings collected from tannery was subjected to size reduction to a fibre. The chrome shavings thus pulverised was used as partial replacement for fine aggregate. A 20 kg fine aggregate of sand of 6. Following this a 2 kg of polymer modified emulsion was added and the mixer machine was allowed to rotate further for 2 minute to obtain the.
The mix was then used for road construction in the following manner. It was spread on the pre-measured area of about 2 m2 on a heavily trafficked road greater than No compaction was provided.
Simply the mixes were spreaded to the entire area and allowed for curing. After two hours the traffic was allowed. Example 2 A 20 kg fine aggregate sand passing 9. Following this a 5 kg of natural rubber modified emulsion was added and the mixer was allowed to rotate for 2 minute to achieve uniform coating of. The slurry was then spread on the pre-measured area of about 2 m2 area. Example 3 A 20 kg fine aggregate sand passing 6. Light compaction was provided. One hour soak, Maximum The process suggests a very simple and economically viable solution for utilization of.
Thermo-gravimetrically, the stability of TLF powder or its Slurry Seal encapsulated form can with stand atleast C, without undergoing any major weight loss due to. Spreading of micro surfacing slurry can be conveniently carried out in a temperature range of 10 C C. A process for the preparation of the composition of slurry seal mix as claimed in. A process as claimed in claim 2, wherein the machinery used for the mechanical.
Apply a slurry seal if your pavement surface has minor defects but is still structurally sound. Hold off on application if rain is imminent or if there is a possibility of freezing temperatures within 24 hours of application. Asphalt resurfacing is a process used to repair asphalt pavement. Slurry seal is a type of asphalt resurfacing treatment.
Trained operators continually monitor the automatic mixing procedure. The slurry mixture flows out of the rear of the truck and onto the pavement within the confines of a spreader box attached to the rear of the truck. The box is capable of spreading the slurry seal over the width of a traffic lane in a single pass and is constructed so that close contact with the existing surface is maintained. Trained personnel with squeegees follow behind to help spread the mixture, as well as to keep the mixture off concrete areas like curbing and gutters and, if necessary, to remove the slurry seal from areas not properly covered.
They also may complete the slurry seal spreading to areas inaccessible to the spreader box. The best solution depends on the condition of the pavement. Slurry seal is used to correct minor defects and is laid at a one-stone thickness. Micro-surfacing is used to correct moderate to severe defects. The addition of better quality aggregates and advanced emulsifiers make for a more stable product that can be applied in multi-stone thickness. Trained personnel with squeegees follow behind the slurry truck to remove slurry seal from any areas, such as metal utility covers, not properly covered.
If necessary, slurry seal can be washed off of vehicles, as well. As a property manager, you understand how important it is to stay ahead of the curve on pavement maintenance. But ignoring those small warning signs can lead to disaster. Instead of ignoring the beginning stages of pavement failure, you should meet the problem head-on and address it before it turns nasty.
And while slurry seal has a cost, it is estimated that it is still almost 14 times cheaper than needing to replace your asphalt prematurely due to poor maintenance.
Make the right decision and maintain your asphalt using slurry seal so you save long-term money, time, and stress. Slurry seal is a cold mix coating consisting of fine crushed aggregate, emulsified asphalt, additives, and water applied to roadways.
VSS International, Inc. We design, build and install pavement preservation systems on projects of all sizes, both public and private. VSS International has been honored with the most prestigious awards in the industry. These awards are made possible by the total commitment of the entire organization to safety and quality. The ends of the retainer are secured to the rearward ends of distributing box 10 is conthe side frame members 13 by a pair of side frame clamps The clamps 21 are demountably attached to the upper edges of the side frame members 13 and extend downwardly therefrom so that the ends of the retainer 20 are clamped against the inside faces 22 of the side frame members From its ends the retainer 20 extends in an arcuate manner forwardly and inwardly within the rectangular main frame such that it is symmetrically disposed with respect to the longitudinal centerline of the frame.
The midpoint of the retainer lies closely adjacent and in tangential relationto the forward cross frame member The retainer is secured to the forward cross frame member 11 by a pair of cross frame clamps 23 similar to the side frame clamps The cross frame clamps 23 are demountably attached to a pair of triangular-shaped brackets 24 which are in turn secured to the forward cross frame member 11'on opposite sidesof its midpoint.
The brackets 24 have downwardly depending vertical faces against which the retainer 20 is clamped by the cross frame clamps 23, said vertical faces being disposed to maintain the arcuate shape of the retainer. A pair of intermediate braces 25 interconnect the forward and rear cross frame members 11 and 12, respectively, to provide added structural rigidity to the slurry box. Attached to and depending downwardly from each brace 25 is a back-up pad 26 disposed intermediate each pair of clamps 21 and The back-up pads 26 provide additional support to the retainer 20 and aid in main- 'taining the arcuate shape thereof.
The retainer 20 may,. The vertical surfaces of the pads 26 may be curved to conform more closely to the curvature of the retainer, a shown. However, since continuous curvature of the retainer over its entire length is not essential, the vertically disposed surfaces of the pads 26 may be flat. Thus, the retainer, though having a generally arcuate shape in its mounted position, may have portions which are flattened.
In addition to the portions of the retainer which may be flattened by their abutment against the backup pads 26, the portions by which the retainer is mounted with the clamps 21 and 23 may also be flat. In operation, the pre-mixed slurry is poured or chuted directly into the reservoir formed by the intermediate retainer 20 and the rear cross frame member '12 and depending squeegee The typical slurry seal mix comprises an emulsified asphalt and a fine-grained aggregate.
A small percentage of portland cement may also beincluded. As is particularly the case with a slurry containinga cationic asphalt emulsion, a rapid and irreversible break or set will occur on deposition of the slurry on the surface that is being treated. The arcuate shape of the intermediate retainer 20 provides a continuing mixing and agitation adapted to prevent breaking of the slurry within the reservoir.
The slurry is generally poured into the box centrally thereof and at a point just inside the forward cross frame member 11, as by means of a chute 36 extending rearwardlyffrom the back of the towing and supply vehicle. The flow of slurry into the reservoir is adjusted to correspond to the volume of slurry deposited on the surface with the forward movement of the box.
In this manner the depth of slurry in the reservoir is maintained fairly constannAs the box is moved forwardly, the slurry flows generally radially toward-the rear cross frame member 12 and attached squeegee As can be seen from the drawing, the shape of the retainer 20 conforms very nearly to the natural path of flow'of the slurry from the supply point to the rear corners.
The arcuate retainer 20 eliminates, as a portion of the slurry reservoir, the areas within the main frame adjacent and including the forward corners; i.
Since these areas are outside the natural direct flow path of the slurry, elimination of them'eliminates areas where, in prior art boxes, the flow of slurry is sluggish and the tendency of the slurry to break and build up is greatest. The arcuate shape of the retainer 20 is also adapted to prevent an undesirable build-up of slurry in the rear corners of the box
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