AU2021106229A4

AU2021106229A4 - Smart rigid pavement

Info

Publication number: AU2021106229A4
Application number: AU2021106229A
Authority: AU
Inventors: Supriya reddy Ananth; Venkat Praveen Gannavaram; Mudavath Heeralal; Venkatesh Noolu; Yeswanth Paluri; Rathish Kumar Pancharathi
Original assignee: Ananth Supriya Reddy Mrs; Gannavaram Venkat Praveen Dr; Heeralal Mudavath Dr; Noolu Venkatesh Dr; Paluri Yeswanth Dr; Pancharathi Rathish Kumar Dr
Current assignee: Ananth Supriya Reddy Mrs; Gannavaram Venkat Praveen Dr; Heeralal Mudavath Dr; Noolu Venkatesh Dr; Paluri Yeswanth Dr; Pancharathi Rathish Kumar Dr
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-02-03
Anticipated expiration: 2029-08-20

Abstract

SMART RIGID PAVEMENT The present invention disclosed smart rigid pavement, wherein a plurality of strain gauge wires 101 are embedded into the rigid pavement. All the strain gauge wires are of specific size and dimensions and have similar electrical properties. These wires 101 are placed in pavement structure as shown in FIG 1, wherein all the strain gauge wires 101 are connected to microcontroller 103 through a PVC sleeve based copper conductor 102. The strain gauge wires serve as stress measuring sensors and a reinforcing agent to the rigid pavement. The microcontroller 103, set in a hibernation mode, activates periodically and passes electrical signals into the strain gauge wires. The microcontroller ascertains whether the deformation exists based on the electrical parametrs data acquired and the anomaly in electrical signals. If any discrepancy is observed, then microcontroller 103 alerts the user through IoT communication protocol.

Description

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TITLE Smart Rigid Pavement

The preface to the description

The succeeding description predominantly defines the invention and the way in which it is to be achieved.

DESCRIPTION METHODOLOGICAL FIELD

[0001] The present disclosure generally relates to the construction of rigid pavement. More particularly, implementing IoT and intelligent sensors in Steel Fiber Reinforcement and Recycled Aggregate Concrete (RCA) to construct versatile smart rigid pavement.

BACKGROUND

[0002] Concrete plays a vital role in modem civil engineering works, and it is the primary key material used for construction. Steel-fiber as an ingredient reinforced the concrete and hence stressed the advantages of its use in construction techniques. Concrete Reinforcement by Steel Fiber- is a type of concrete potentially used because of the benefits in increased monotonic and dynamic tensile strength, energy-absorbing features, and better fatigue strength. Unlike conventional concrete without fibres, the addition of fibres through uniform dispersion in the concrete stimulates isotropic properties. Microcracking problems in the concrete, leading to early concrete damage overcome by the use of fibres.

[0003] A known fact that accelerated depositions of building wastes have been described for more than 30 per cent of municipal wastes. If these wastes are recycled and utilized again as aggregate, it can save the natural aggregate resource and copups disparities between supply and demand.

[0004] Construction of rigid pavements requires appropriate improvement techniques for design methods to withstand deformation and degrade subsequently under traffic loads. The stability and performance of these pavements are greatly influenced by the materials used for

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pavements. All the pavement systems, whether permanent or temporary, eventually derive from their strength from these materials. In general, the rigid pavement once laid show excellent properties but when applied a load, especially a wheel loader, the pavement comport itself like a plate of elastic resting on a viscid medium.

[0005] There is a need for a replacement for convention concrete which uses natural aggregate, which is overexploited due to massive demand in the construction area and cement, produced with a considerable amount of carbon emission to the atmosphere. Also, there is a need to incorporate new techniques such as IoT and Al applications in these types of structures to evaluate and sustain the proposed rigid pavement. Such recycled aggregate-based rigid pavement could also be a reliable alternative to using natural aggregates in concrete construction.

[0006] Numerous prior arts have attempted to effectively use various aggregators and IoT and Al methods to build structures using waste materials but cannot integrate them as one.

[0007] Similarly, several prior art disclosures have ascertained best devices and practices for integrating IoT and Al and structures, but they haven't established the requirements of users in a single device.

[0008] Articles in the prior art CN102390963B The invention discloses a recycled aggregate comprises raw materials of fine aggregate, coarse aggregate, a gelatinizing agent, a water reducing agent and water, wherein the gelatinizing agent comprises cement and coal ash, and the coarse aggregate comprises 50-100 per cent of recycled coarse aggregate prepared from the wastes from a demolished building. The preparation method comprises the following steps of: pretreating the building waste, removing impurities, remaining waste concrete, waste bricks and the like; crushing and screening to prepare the recycled coarse aggregate; mixing the recycled coarse aggregate, natural sand, cement and water according to the proportion, adding the coal ash and the water reducing agent, stirring uniformly to obtain a mixture; and squeezing and forming the mixture, curing for 2 days to obtain the recycled aggregate medium-dry hard concrete. The invention solves the problems of worsening ecological environment and the like caused by difficulty in treating the building waste; and the building wastes are used for manufacturing the recycled aggregate for replacing natural aggregate, the increasingly deficient natural aggregate and damage degree to the ecological environment are reduced, and the living environment of human beings is protected.

[0009] In the prior art CN104099845B, with titled The Highway Pavement Structures of aggregate are used as using building waste presented a kind Highway Pavement Structures using building waste as aggregate, it is related to Highway Pavement Structures technical field of improvement, including basalis, underlayment, basic unit and the surface layer laid successively from top to bottom ; The material of the basalis and underlayment is discarded

concrete, and the particle diameter of discarded concrete used by basalis is 50-150mm ;

Underlayment uses particle diameter for 9.5-26.5mm discarded Concrete ; The basic unit uses

particle diameter for 4.75-40mm basic unit's aggregate ; The surface layer uses particle

diameter for 2.36-20mm surface layer aggregate.The present invention is not spiked with binder, pavement structure is reached preferable intensity, rigidity and stability by effects such as the embedded squeezing between aggregate, lock knots, disclosure satisfy that the road of standard highway pavement structure with requiring.

[0010] Another Prior art, Publication No. 101698578A, publication date discloses one for the Chinese patent literature on April 28th, 2010 Plant using building waste as highway road surface material, include 40~60% building waste, 20~45% rubble and 0~25% Aggregate chips, described building waste by mortar, brickbat and coagulation local soil type into, wherein the weight ratio of mortar and brickbat is 30-60%, Described building waste particle diameter is 0.01-9.50mm, and wherein 0.01-2.36mm of particle diameter building waste percentage by weight is more than 90%.The invention can handle substantial amounts of building waste in city, saved soil, reduced environmental pollution, meanwhile, also reduce The cost of pavement structure material.

[0011] Similar prior art CN101619557B - invention discloses a kind of pavement base using regenerated inorganic binder stable material layer with the thickness of 180-800 mm is constructed above a lower bearing layer, and a road pavement layer is constructed above the regenerated inorganic binder stable material layer; the regenerated inorganic binder stable material layer is formed by mixing brick mixed building rubbish regenerated aggregate grains and common aggregate and base gelation power and is divided into one layer to four layers, and every small layer selects one of three mixture ratios. The invention adopts the brick mixed building rubbish regenerated aggregate as a main raw material. By applying the brick mixed building rubbish regenerated aggregate to pavement materials, the invention solves the problems of low utilization rate, narrow range of application, small application quantity and the like of the brick mixed building rubbish. The application performance of the pavement base course material not only can meet the prior standard and the practical application condition requirement of engineering, but also has relatively better durability and mechanical property by test comparison of freeze thawing, strength and the like.

[0012] In Prior art CN104030640B titled a kind of regeneration aggregate permeable concrete and preparation method thereof emphasized on a kind of regeneration aggregate permeable concrete and preparation method thereof, belong to regeneration aggregate permeable concrete technical field, comprise each component of following mass percent: coarse aggregate consumption accounts for 71.77% ~ 73.16%, cement consumption accounts for 18.88% ~ 19.04%, water consumption accounts for 6.58% ~ 8.14%, and silicon ash consumption accounts for 1.21% ~ 1.22%.Wherein regeneration aggregate and natural aggregate must meet II class stone standard, and regeneration aggregate volume can be made by oneself according to actual performance index.Cement is 42.5 grades of ordinary Portland cements.The volume of silicon ash is 6% of gel material content.Preparation method: stir, vibrate shaping, floating.Adopt volumetric method design mixture proportion, prepare concrete according to predetermined preparation flow.This regeneration aggregate permeable concrete, can solve on the one hand the recycling problem of discarded concrete, on the other hand can effective recharge groundwater, collects, purification and recycling water resources, alleviation "tropical island effect ".

[0013] In an invention stated in the document CN105084834A, the invention discloses a kind of recycled concrete with waste clay bricks as replaced coarse aggregates and a preparation method of the recycled concrete. The recycled concrete comprises water, cement, sand, broken stone and waste bricks according to the weight ratio of I to 2.1-2.5 to 2.9-3.2 to 4.7-5.3 to 0.6 1.1. The preparation method includes the steps of calculating the ratio, preparing the materials, preparing the waste bricks, and conducting crushing through a jaw crusher, wherein the crushing particle size is controlled within the range of 20 mm to 50 mm; screening aggregates after breaking, wherein screening is conducted through a screen with the aperture of 50 mm first, residues on the screen continue to be crushed, then the crushed residues are screened through a screen with the aperture of 20 mm, and residues on the screen are kept; throwing in the materials to be stirred. The recycled concrete has the advantages that the recycled concrete is optimal in replacement rate, high in strength, excellent in material mechanical property, environmentally friendly, low in carbon emission, easy to prepare and the like, and the materials of the recycled concrete can be conveniently obtained.

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[0014] The present invention effectively utilises rubbish materials as Recycled Aggregate Concrete and steel fibre reinforcement to construct rigid pavement structures.

[0015] All prior arts herein are fused by the situation to the same extent they intended to be incorporated by reference. A definition or use of a term is unique for this invention and the definition of that term in the reference does not apply to this invention.

SUMMARY

[0016] The present disclosure is focused on the Smart Rigid-Pavement made of Recycled-Aggregate Concrete Reinforced with Steel-Fiber and integrated with smart sensors and IoT communication protocol.s

[0017] The present disclosure is focused on the use of aggregate specifically derived from recycled material and its suitability for the construction of the rigid pavements and enhancement of mechanical properties by adding steel fibre in Recycled Aggregate Concrete and sensor wires.

[0018] In another classic entity of the extant revelation is directed towards the mixture aggregation of DLC (Dry Lean Concrete) Layer wherein the Materials Used OPC confining to IS-12269 are Ordinary Portland-Cement, 20mm nominal size crushed-aggregate, River-sand as the fine-aggregate

[0019] Another characteristic of the present subject matter is engaged in the direction of selecting CA nad FA 2.6 and 2.8 are the specific-gravity respectively, while the IS-383 is grading of the coarse-aggregate and zone-II sand was selected.

[0020] Similarly, in a feature of the present issue is rapt towards the composition of the DLC layer; the proportion of 1:4:8 with suitable water content (IRC SP-49:1998) all the ingredients are mixed.

[0021] Another feature of the present topic is the inclusion of strain gauge wires in the DLC layer, whose primary characteristics are the prevention of cracks and firm structural supports for construction equipment and enhancing the pavement performance under frost action.

[0022] Similarly, another aspect of the present innovation is directed towards the volume change control in expansive soils by DLC layer and improve the load transfer at pavementjoints because of steel fiber and strain guage wires.

[0023] Another disclosure relates to the integration of sensors present in the DLC layer and microcontrollers to collect data and transmit data through IoT protocol.

[0024] In another disclosure in this matter, strain gauge wires are placed in the concrete layer according to the necessity, and the primary function is to get the deformation data pertaining to the pavement at the place of interest.

[0025] In a similar arrangement in the fourth coming explanation, the strain guage wire is attached to a voltage source controlled by a microcontroller.

[0026] These and other things and topographies of the current disclosure become clear from the further revelation to be made in the detailed description below.

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Conferring to an exemplary incarnation of the current specification, FIG.1 is a diagram depicting 100 Smart Rigid Pavement.

[0028] Conferring to an exemplary incarnation of the current specification, FIG.2 is a diagram depicting 100 Hardware configurations of Smart Rigid Pavement.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS

[0029] Wellknown fact that the Natural Aggregates (NA) critical shortage for the production of new concrete, demand for the need of reutilizing demolished concrete to develop new concrete. The concrete made of the aggregators derived from the building waste is termed Recycled aggregated concrete.

[0030] Further to it, Recycled Aggregate size, degree, shape and surface impact the properties of concrete. It is to be noticed that the totals are covered with old mortar, for which the assessment of designing properties is fundamental. The devastating strength and solidness are predominantly reliant upon the measure of appended mortar to the reused total. The joined mortar altogether influences the mechanical and designing properties of reused total Aggregates possess the greater part of the volume of concrete. Their size, degree, shape and surface affect the properties of concrete. For qualifying the utility of reused total in concrete, the significant boundaries like mass thickness, voids proportion, explicit gravity, water retention, squashing and sway worth, precision and not really set in stone and checked dependent on codal arrangements

[ASTM D-3398,1997].

[0031] In an exemplification, To analyze the conduct of reused aggregator based fibre based concrete specimens, concrete of grades M40 was picked. The plan of projecting the specimens was accomplished for the level of substitution of reused aggregator (0, 50 and 100%) in a normal aggregator. The behaviour of specimens under pressure, Split strain and Flexure is being researched. For these examinations, 150 x 150 mm 3D squares for compressive strength, 150 mm breadth and 300 mm tallness chambers for split rigidity and 100 x 100 x 400 mm crystal examples were taken for contemplating the modulus of crack. The program comprised of projecting and testing an all nine cubes, nine cylinders and nine prisms cast in three clusters. In each cluster three specimens for regular aggregators, three specimens for half normal and half reused and three specimens for 100% substitution. Of these, three each relates to 0, 50 and 100% reused aggregators swaps separately for 28 days strength. The blend was planned according to ACI technique for blend plan (1996). Every one of the examples was remolded after 24 hrs and kept in water for relieving for 28 days. The specimens were covered utilizing Plaster of Paris to guarantee plane-testing surface.

[0032] Further, in an embodiment of the present subject matter, Materials Used are (A) Cement: The Ordinary Portland cement with IS 8112-1989specifications and 3.15 is the specific gravity, the initial and the final setting time was 105 minutes, 295 minutes respectively. (B) Fine aggregate: fine aggregate used is River sand of Zone II of IS 383-1978. Wherein 1.41 and 2.68 are the bulk density and specific gravity of thefine aggregate respectively. (C) Coarse aggregate: coarse aggregate is derived from machine crushed granite. (D) Superplasticizer: Conplast 430 (E) Steel Fibres: a diameter 0.5mm Crimped steel fibres added in the proportion of 1% by volume of concrete and with an aspect ratio of 72. (F) Water: Freshwater. All these ingredients are mixed in 1:4:8 proportion in the DLC with suitable water content (IRC SP-49:1998). The addition of steel-fibres and strain-gauge sensor wires in Recycled-Aggregate based concretes the hardened properties showed satisfactory results.

[0033] In an exemplifier, the concrete layer is deposited on the wire mesh as depicted in FIG 2, wherein the wire mesh is the strain gauge specific wire whose electrical properties vary with respect to stress and strain on that wire caused due to the impact of rigid pavement deformation and other aspects. Once the concrete is reinforced with steel fibre poured on the wire mesh, the wire mesh acts as a stress calculator and strengthens the said portion.

[0034] In another embodiment, it is stated that when the rigid pavement laid as per the specifications disclosed in the present disclosure is subjected to stress and another type of loads, the stain gauge wires laid as a mesh reacts to it, and the electrical property changes are noted by the microcontroller embedded into the system. This data collected is transferred to the user over the mesh network.

Claims

1/1 STATEMENT OF CLAIMS We Claim:

1. A Smart Rigid-Pavement having the plurality of Strain Guage Wires 101 incorporated in a rigid pavement constructed with concrete made of Steel-Fiber Reinforcement and addition of Recycled-Aggregate (RA) ;and All the plurality of Strain Guage Wires 101 are connected to microcontroller 103 through the PVC sleeved copper conductors 102; and An anomaly in the electrical properties of the strain gauge wire triggers an alarm to the user over the IoT communication protocol.

2. As claimed in claim 1, Materials Used are (A) Cement: The Ordinary Portland cement with IS 8112-1989specifications and 3.15 is the specific gravity, the initial and thefinal setting time was 105 minutes, 295 minutes, respectively. (B) Fine aggregate: fine aggregate used is River sand of Zone II of IS 383-1978. Wherein 1.41 and 2.68 are the bulk density and specific gravity of the fine aggregate, respectively. (C) Coarse aggregate: coarse aggregate is derived from machine crushed granite. (D) Superplasticizer: Conplast 430 (E) Steel Fibres: a diameter 0.5mm Crimped steel fibres added in the proportion of 1% by volume of concrete and with an aspect ratio of 72. (F) Water: Freshwater. All these ingredients are mixed in 1:4:8 proportion in the DLC with suitable water content (IRC SP-49:1998). The addition of steel-fibres and strain-gauge sensor wires in Recycled-Aggregate based concretes the hardened properties showed satisfactory results.

3. As claimed in claim 1, the microcontroller ascertains whether the deformation exists based on the electrical parameters data acquired and the anomaly in electrical signals. If any discrepancy is observed, then microcontroller 103 alerts the user through IoT communication protocol.