BRPI0704965A2 - method of supplying concrete to works and equipment to supply concrete to works - Google Patents

Abstract

METHOD OF PROVIDING CONCRETE WORKS AND EQUIPMENT TO PROVIDE CONCRETE WORKS. The present summary relates to a patent for a method and equipment for properly conveying and supplying concrete, belonging to the field of media used in construction works, which has been developed to improve the supply of this important input; said method essentially comprising the steps of: 1) - In a concrete batching plant distant from the work, dose the concrete inputs; 1.2) - Load concrete inputs: dry cement, natural moisture aggregates, water and additives dosed and separated in a special transport equipment, mobile aggregate box; 2) - Transport from the concrete dosing plant to the work site, in the mobile aggregate box, the dosed and dry concrete, so that its inputs are not mixed and there is no reaction; 3) - On site and with own resources from the mobile aggregate box, transfer the previously separated dry and dosed inputs to the mixer of a concrete mixer truck where they are homogenized; 3.1) - Transfer the dosed water to the concrete mixer, adding it to the cement, sand and stone, which are being homogenized; 3.2) - Transfer the additives to the concrete mixer; 3.3) - Mix the mixture with the concrete mixer truck mixer; 4) - Once the concrete specifications have been reached within the bladder, "cast" it in the usual way and a preferred construction for the mobile aggregate box (10), which conveys dry and dry concrete, is further described in the present patent. between the concrete dosing plant (I) and the work.

Description

"METHOD OF PROVIDING CONCRETE WORKS AND EQUIPMENT TO PROVIDE CONCRETE WORKS"

This descriptive report relates to a patent for a method and equipment for providing concrete, belonging to the field of media used in construction works and designed to improve the supply of this important input.

Concrete, as well as steel, are probably the main materials used for the construction of slabs, beams, pillars, foundations, floors and other parts in civil works. Concrete is composed of cement and aggregates comprised of stone, sand and water used in proportions, traces, according to strength and other desired characteristics and also containing additives, according to their application on site. Concrete can be manufactured in several ways. Today, the most commonly used way is that made by specialized concrete companies. In this form of supply, the components of concrete, cement, sand, stones, water and additives are dosed in a distant plant of the work, after which they are loaded in a mixer truck, which homogenizes, during transport between the plant and the constructions. The concrete arrives at the site substantially ready, where it can receive other additives, and be "cast", if necessary with the aid of other equipment such as pumps, in the form of the parts to be built, inside which the hardware is already housed. During transport, the cement reacts progressively with water by binding to the concrete. For this form of supply to be efficient, all operation must be done within the proper time so that the hardening process of the concrete does not start. In practice, the transport time between the concrete batching plant and the site may be subject to imponderable factors, such as traffic or some breakdown of the concrete mixer truck or others that may compromise the best state in which the concrete comes to the work, which is undesirable.

Another drawback to this form of concrete delivery is that in order to observe the proper time between the dosing plant and the site, the concrete mixer trucks have to travel at high speeds, which can be a risk, especially since these trucks are extremely heavy and added The weight of concrete can cause serious accidents if for some reason they become runaway.

Another drawback of this form of supply is that a concrete mixer truck has relatively small capacity, which may require several trips, depending on the volume of concreting to be made.

To overcome this, another form of supply consists of mini concrete batching plants that are installed on the jobsite itself. It turns out that this type of supply is only technically and economically viable in large works.

Thus, the aim of the present invention is to provide a method and equipment for concrete delivery that overcomes the usual problems.

Another objective is to provide a method and equipment that, in addition to overcoming the problem, is not for its implementation and construction or manufacturing with levels of complexity that make them uninteresting in the face of the usual.

Another objective is to provide a suitable method and equipment for acquisition, operation and maintenance costs.

In view, therefore, of the above problems and in order to overcome them and in order to meet the related objectives, the method and equipment for the on-site supply of works, object of the present invention patent, developed by substantially providing the dosed concrete and in natural humidity (dry), for this purpose being provided steps of dosing the cement, aggregates (sand and stones), water and additives in a concrete dosing plant distant from the work; transport the metered concrete inputs separately and in natural humidity in appropriate equipment between the plant and the site and mix and homogenize the inputs in a standard concrete mixer truck, composing and homogenizing the concrete, just before launching. The equipment implementing the method essentially comprises, in addition to the usual equipment, such as a concrete batching plant, concrete mixer truck, launching pumps and others, equipment specially developed for the method, comprising essentially mobile aggregate box, which has Substantial form of bucket mounted on a truck chassis, subdivided into compartments and receiving silos, respectively, of separate and naturally moist aggregates (sand and stone) and cement (dry) and dosing water receiving reservoirs; Said compartments, silos and reservoirs receive the respective inputs in proportions according to the trace of the concrete being manufactured; said equipment further comprising unloading and transferring means for the concrete mixer truck.

The concrete delivery method, provided by the present method and equipment, solves the problems found in the usual way based on concrete mixer trucks, since the concrete is dosed with the rigor necessary to meet the technological standards of concrete production far from the site and only it is effectively "on-site", that is, on site, so that there is no risk of compromising it during transportation between the dosing plant and the site, as it does with concrete mixer trucks.

Despite the above advantage, the present method and equipment do not involve constructions or fabrications or costs that may make them uninteresting in comparison to the usual ones.

Another advantage of the present mobile aggregate box is that it can have a significantly higher capacity than that of a standard concrete mixer truck, thus favoring a smaller number of trips in a concrete and consequently greater agility, better quality and, mainly, less traffic and pollution and also reducing costs to work.

The accompanying drawings show the method of providing concrete to works and equipment to provide concrete to works, objects of the present patent, in which:

fig. 1 shows a block diagram of the method;

fig. 2 shows a schematic of the equipment assembly according to the invention, which implements the method of figure one;

Figs. 3, 4, 5 show, by way of illustration and non-restrictively, a possibility of carrying out the equipment which conveys the metered and in natural (dry) moisture between the dosing plant and the workpiece, according to the present invention, seen in perspective, in plant and cut, respectively, fig. 6 shows a schematic of the equipment illustrated in the previous figures working in conjunction with a usual concrete mixer truck, in the concrete mixing and homogenization operation, on site, before its launching.

In accordance with the above illustrated illustrations, the method, object of the present invention, is intended for the supply of semi-finished natural and dry moisture (dosed) concrete in civil construction works and is comprised essentially by steps of (fig. 1):

1) - In a concrete batching plant distant from the work, dose the concrete inputs: cement; aggregates (sand and stone), water; and additives, in proportions according to the trace of the concrete to be manufactured;

1.2) - Load the dosed concrete inputs, natural (dry) and separated into a special transport equipment, mobile aggregate box, such that the dry dosed cement is stored in a closed silo; aggregates (sand and stone), dosed and in natural moisture (dry) are in their compartment (s), water is in its own reservoir and additives in containers;

2) - Transport from the concrete dosing plant until the work, in the mobile aggregate box, the dosed concrete and in the natural (dry) humidity, such that its solid inputs: cement is dosed and dry and the aggregates (sand, stone) if dosed and mixed in their natural moisture plus liquid inputs: water and additives are dosed, all said inputs (cement, aggregates, water, additives) separated from each other without reaction during transport;

3) - In the work and with own resources of the movable segregated box, transfer the dry dosed cement; and the aggregates (sand, stone), dosed and in natural moisture, hitherto separated, to the concrete mixer a concrete mixer truck, where they are homogenized;

3.1) - Transfer the dosed water, stored in the mobile aggregate box reservoir, to the concrete mixer in order to homogenize the cement, sand and stone;

3.2) - Transfer the additives to the cement, sand, stone and water mixture being homogenized in the mixer;

3.3) - Mix the cement, sand, stone, water and additives mixture with the concrete mixer truck mixer;

4) - Achieved the homogenization and other specifications of concrete within the concrete mixer, "cast" it in the usual way (conventional or pumped method).

The equipment that provides the method, as described above, is essentially comprised (Fig. 2): by the usual concrete dosing plant 1 distant from the work, which doses the concrete inputs: cement, aggregates (sand, stone), water and additives and carries dry cement, aggregates (sand, stone) with natural moisture, water and dosed additives and all separated from each other in equipment specially developed for the method, movable aggregate box; said movable aggregate box 10, which carries said concrete inputs (cement, aggregates, water, additives) separated and dosed between the concrete batching plant 1 and the work site; by a concrete mixer 30, which homogenizes the cement, sand, stones, water and additives into the concrete; and by usual concrete "launching" equipment 40 such as pumps and others.

Movable aggregate box 10 (Figs. 3 to 5) is comprised essentially of: bucket 11 mounted on the chassis of a small or medium or large truck 50 or single or double "Romeo and Juliet" trailers; said bucket 11 has its interior divided by transverse partition wall (s) 12 into two or more compartments 13, which receive the aggregates (sand, stone), dosed and in natural moisture.

Each aggregate compartment 13 has an inclined and vibrating bottom 14, said inclination being in the transverse direction of the bucket and defining a higher side and opposite lower side of the bottom 14; Said aggregate compartment 13 is further comprised of: vibrators 15 mounted on the bottom of the hopper under the bottom 14 and vibrating this in the discharge operation; by water reservoirs 16 disposed at the bottom of the hopper under the highest side of overfund 14 and with loading and unloading opening at the rear or side of the hopper; by side discharge conveyor belt 17 mounted on the bottom of the hopper under and along the lower side of the bottom 14 and whose outlet is disposed at the rear opening of the hopper, with conveyor belts 17 of different aggregate compartments 13 overlapping.

The movable aggregate box 10 is formed by closed silos 18, which receive the dosed and dried cement and arranged in corresponding aggregate compartments 13; each closed silo 18 is mounted suspended on or near the inner side of the bucket side, with the lower outlet above the conveyor belt 17 of the corresponding aggregate compartment 13.

Said movable aggregate box 10 is further formed by a lifting belt 19, mounted on the rear of the bucket, subjected to the movement mechanism, which moves it between a retracted collapsed disuse position on the bucket and use position, in which the entrance of said belt Elevation 19 is under the exit of the discharge belts 17 and the wing is arranged over the entrance of the concrete mixer 30 and dumps the cement, sand and stone mixed into it.

The movable parts of the movable aggregate box such as vibrators 17, discharge mats 17 and elevation 19 are driven by mechanisms consisting preferably of hydraulic motors (not shown), which may be driven preferably from the truck motor 50. The mobile unit further provides a pump for discharging or loading the reservoir 16 and hoses working in collaboration with it.

Thus, when in use (Fig. 2), movable aggregate box 10 receives dry cement in silo 18, natural moisture aggregates (sand, stone) in compartments 13, which are dosed from

of suitable silos from the concrete dosing plant 1, water is still received in its reservoir 16 and the additives are packed in suitable containers. Under these conditions, the mobile aggregate box 10, accompanied by a concrete mixer truck 30 and other commonly used concrete equipment 40, travels to the site. On site (Fig. 6), the movable aggregate box 10 and the concrete mixer truck 30 are arranged in a transfer position, preferably with the rear facing each other; the lifting mat 19 of the mobile aggregate box 10 is moved until it is disposed at the entrance of the concrete mixer 30 and the mobile aggregate box 10 has its unloading stage activated. Upon actuation, the vibrators 15 begin to overhear the inclined overburden 14, whereby the aggregate tends to move the direction of the inclination. Lifting conveyor belts 19 and discharge conveyor 17 move and begin transporting the aggregate to the mixer inlet. Simultaneously, the cement silo 18 has its outlet opened and pours the cement into the aggregate, giving the mixer a dry mix of cement, sand and stone. Then water from reservoir 16, via hose and pump, is fed into the mixer 30. The additives are also fed. All this operation continues until all cement, aggregates, water and additives are fed into the mixer, completing the concrete in the desired stroke. After proper mixing, made in the concrete mixer 30, the concrete is "thrown".

Within the basic construction described above, the method and equipment, particularly the mobile aggregate box, objects of the present patent, may have modifications concerning process steps and parameters, materials, dimensions, construction details and / or functional configuration and / or ornamental, without departing from the scope of the protection requested.

Claims (6)

1. "METHOD OF PROVIDING CONCRETE WORKS", characterized by the steps of: -1) - In a concrete batching plant distant from the work, dose the concrete inputs: cement; aggregates (sand, stone), water; and additives, in the proportions according to the trace of the concrete to be manufactured; -1.2) - Load the dosed concrete inputs, naturally and separated in a special transport equipment, movable aggregate box, such that the dry dosed cement is packed. in a closed silo; the aggregates (sand, stone) dosed and in natural humidity are in the respective compartment (s), the water is in its own reservoir and the additives in containers; -2) - Transport from the concrete dosing plant to the site; In the mobile aggregate box, the dosed concrete and natural moisture (dry), such that its solid inputs: cement is dosed and dry and the aggregates (sand, stone) are dosed and mixed in their natural humidity plus the inputs. liquids: water and additives are dosed, all referred inputs (cement, aggregates, water, additives) separated from each other, without reaction during transport; -3) - On site and with its own resources from the mobile segregated box, transfer the dry dosed cement; and the aggregates (sand, stone), dosed and in natural moisture, hitherto separated, into the concrete mixer of a concrete mixer truck, where homogenization is performed; -3.1) - Transfer the dosed water stored in the mobile aggregate box reservoir, to the concrete mixer in order to homogenize the cement, sand and stone; -3.2) - Transfer the additives to the cement, sand, stone and water mixture being homogenized in the concrete mixer; -3.3) - Homogenize the cement, sand mixture , stone, water and additives with the concrete mixer truck; -4) - Achieving the homogenization and other specifications of the concrete within the concrete mixer, "cast" it in the usual way (conventional or pumped method). 2. "EQUIPMENT TO PROVIDE CONCRETE WORKS" means the method of claim 1, characterized by: the usual deconcrete dosing plant (1) distant from the work, which doses the concrete inputs: cement, aggregates (sand, stone), water and additives and carries dry cement, aggregates (sand, stone) with natural moisture, water and additives dosed and separated in a specially developed equipment for the method, mobile aggregate box; by said movable aggregate box (10), which transports concrete inputs: dry cement, aggregates (sand, pe-dr) in natural moisture, water and additives dosed and separated between the concrete batching plant and the work site; by the mixer of a concrete mixer truck (30), which, on site, homogenizes the cement, sand, stones, water and additives, composing the concrete; and by usual concrete "launching" equipment (40), such as pumps and others. 3. "CONCRETE PROVIDING EQUIPMENT" as claimed in 2, characterized in that the movable aggregate box (10) comprises essentially: bucket (11) mounted on the chassis of a small or medium or large truck (50) or single or double trailers; said bucket (11) has its interior divided by transverse partition wall (s) (12) into two or more compartments (13), which receive aggregates (sand, stone), dosed and in natural moisture, each aggregate compartment (13) has inclined and vibrating bottom (14), said inclination being in the transverse direction of the bucket, and defining a higher side and lower opposite side of the bottom (14); Said aggregate compartment (13) is further comprised by vibrators (15) mounted at the bottom of the bucket, under the over-bottom (14) and vibrating this in the discharge operation; by a water reservoir (16) disposed at the bottom of the hopper under the upper side of the hopper (14) and with loading and discharge opening at the rear or side of the hopper; by a side discharge conveyor belt (17) mounted on the bottom of the hopper under and along the lower side of the bottom (14) and whose outlet is disposed in the rear opening of the hopper, and the conveyor belts (17) of different compartments of aggregates (13) overlap; said aggregate compartment (13) is further formed by its closed silo (18), which receives the dosed and dried cement and disposed suspended and with lower outlet above the conveyor belt (17) of the aggregate compartment (13); Said movable aggregate box (10) is further formed by a lifting belt (19), mounted on the rear of the bucket subject to a movement mechanism, which moves it between a collapsed collapsed disuse position on the bucket and use position, in which said lifting belt (19) has the inlet under the outlet of the discharge belt (17) its outlet is arranged over the entrance of the concrete mixer (30), where it pours the mixed cement, sand and stone. 4. - "EQUIPMENT TO PROVIDE CONCRETE WORKS" as claimed in 3, characterized in that the movable aggregate box (10) may even preferably have four deaggregated compartments (13). 5. "CONCRETE PROVIDING EQUIPMENT" as claimed in 3, characterized in that the movable parts of the movable aggregate box (10) such as vibrators (15), discharge belts (17) and elevation (19) are driven by mechanism. preferably consisting of hydraulic motors, which may be driven preferably from the truck engine (50). 6. "CONCRETE PROVIDING EQUIPMENT" as claimed in 3, characterized in that the movable aggregate box (10) further provides for a pump to discharge or load the reservoir (16) and hoses working in collaboration with it.