Method of vapor curing, mainly block concrete products
(57) Abstract:The invention relates to construction materials, in particular to methods of vapor curing of concrete products, mainly briketirovannogo form. The purpose of the invention is the provision of opportunities for regulation of the intensity of the processes of hardening of the concrete mixture during the passage of the package swietochowski concrete products through a soaking zone in single - and multi-row steaming the tunnels, and increase the uniformity of the temperature distribution of the gas mixture at the height of the zone of exposure of the camera. In the process of discrete transportation of concrete products in packages steaming through the tunnel when they are wet-heat processing is proposed to carry out the steam flow along the package of products, and in periods stop package is additionally directed to pass steam through a package of products by creating over him local areas of excessive pressure. 1 C.p. f-crystals, 3 ill. The invention relates to the field of building materials and can be used for the production of concrete, Solomonic and concrete blocks and other concrete products.The known method Termoplast ulcerous actions including heating of concrete products in the heating zone of the camera, the shutter speed in the area of isothermal soaking and cooling in the cooling zone in the given technological regimes, corresponding to a cycle of wet thermal treatment, in which the curing of concrete products continuously or periodically (discretely) with a given rhythm transported from one stationary zone s to another 
The closest technical solution is a way of wet thermal processing chamber for heat treatment of materials. According to this method trolley with stacked products are moved in the chamber of the heat treatment on the track and the carrier (for example, a gas / air mixture or steam), served in the lower part of the chamber. Due to the presence of perpendicular movement of the trolleys heat-reflecting shields, and the bottom part is made of elastic material in the chamber is the circulation of the supplied coolant RA redistribution with the flow of the gas mixture on its height 
The disadvantage of this method is the presence of non-uniformity in the temperature distribution in the vapor-gas mixture at the height of the camera and lack of control iagnostic processing in the camera continuous action mainly block concrete products, which includes packaging products in districtno transportation service products through the heating zone, soaking and cooling when the supply of steam from the bottom in the zone of isothermal soaking, steam is carried out in parallel vertical planes of the package of products, and in the interim period of service products is additionally directed to pass steam through a package of products by creating on the package of products, local areas of excessive pressure. In addition, changing the length of the steam chamber the pressure of the vapor mixture generated on the package of products.Comparative analysis of the proposed solution with the prototype shows that the proposed method differs from the known fact that provides the possibility of regulating the intensity of the processes of hardening of the concrete mixture during the passage of a package of products through the soaking zone steaming chambers.The proposed solution allows to increase the uniformity of the temperature of the gas mixture at the height of the zone aging products steaming chambers.In Fig. 1 shows an example of executing steaming chambers tunnel type on the proposed spamy the method is as follows.Tunneling double-flow steam curing chamber 1 (Fig. 1) has two adjacent horizontal tunnel, each of which consists of three stationary zones: A heating zone, B zone exposure, zone cooling products.Loading the camera is at one end, the discharge from the other end of the tunnel. The tunnel length is divided into separate compartments. In the chamber organized the movement of workpieces in two mutually opposite directions for the two streams of products subjected to wet-heat processing, formed a common area B exposure. Package products stack layers, consisting of near swietochowski small parts, for example, concrete, Solomonic or cinder blocks (located in the forms or without them), and the channels between them. Thus, for example, in each layer perpendicular to two adjacent rows of products of the previous layer. When working steaming chambers are steam flow in the lower part of zone B extracts chamber through the perforated distribution manifold 2 with holes parallel to the vertical planes of the package of products and the resulting vapor mixture fills the entire volume of the chamber (zone a, B, C). Regulation of the steam flow rate is carried out with the Ohe And heating (Fig. 2) on pallets 5, located on the bracket 6, is suspended using blocks 7 on the rail 8, is laid along the axes of the tunnels at the top of the camera. This area is heated inside batches of products subjected to wet-heat processing. When discrete (pulsating) transport with the given rhythm in zones a, B, camera packages 4 are moved from one compartment of the camera in the other and stop in each of them. In the upper part of each of the compartments (Fig. 2 and 3) has a shaft 9 to host the axial blade wheel 10 and the turbine 11, which serves to rotate (drive). The turbine is driven by steam supplied to it through the nozzle 12 from the steam pipe 13, is laid along the monorail 9. When stopping package products in each of the compartments of the tunnels directly under axial blade wheel 10, the latter due to its rotation creates over local service area excessive pressure and steam-air mixture moves up and down through the channels 14 between the rows of 15 products (Fig. 2 and 3), thus increasing the turbulization in the chamber, increasing the efficiency of heating products in the area And their heating, intensificar the process of evaporation of moisture from the concrete and accelerating the process of its torden the pair, supplied to the nozzle 12, it is possible to adjust the frequency of rotation of the axial impeller 10 and accordingly to change the pressure of the vapor mixture generated on the package of products along the length of the steam chamber, which in turn, causes a change in the velocity of the moving air-steam mixture through the channels 14 in the package of the product, the intensity of heating products in the area And their mode of exposure in the zone B and the cooling zone In the camera. Knocked out in the ends of the tunnel camera work openings for loading and unloading products steam-air mixture passes through the heat exchanger-condenser 16, is captured by means of the exhaust umbrellas 17, carries out the second time through capacitors 18 and using a recirculating fan units 19 to the duct 20 is fed to the cooling chamber C. the regulation of the amount of recirculated air supplied to the zone of the cooling chamber and ejected from the chamber into the atmosphere through the throttle valve 21 located in the duct 22. The condensate from heat exchangers-condensers 16 and 18 of the steam chamber is controlled through the pipes 23 and 24, the water for cooling these capacitors is supplied from the circulating system W. Side loading and unloading of products related parts of the tunnels included in the zone of heating and cooling steaming chambers separated by a flexible partition.The proposed method is possible to design the steam chamber with any number of parallel active tunnels.SOURCES OF INFORMATION
1. Burov Y. S. Technology of building materials and products. M High school, 1972, S. 463.2. USSR author's certificate N 751804, class C 04 B 41/30, 1980. 1. Method of vapor curing, mainly block concrete products, in camera continuous action, including packaging products and discrete transportation service products through the heating zone, soaking and cooling when the supply of steam from the bottom in the zone of isothermal aging, characterized in that the steam in the steam chamber is carried out in parallel vertical planes of the package of products, and in the interim period of service products additionally passed steam is directed through a package of products by creating on the package of products, local areas of excessive pressure.2. The method according to p. 1, characterized in that the change in the length of the steam chamber the pressure of the steam locomotive
FIELD: building industry branches, namely apparatuses for heat treatment of constructions of reinforced concrete erected in building site with use of automatic control of heat treatment processes.
SUBSTANCE: apparatus includes concrete form having electric heating units mounted in its boards for convection-irradiation heating of concrete mixture and heating members mounted in bottom of concrete form for convection-irradiation heating; temperature pickups having individual control circuits and connected to inlets of heat regulators. Outlets of heat regulators are connected through switching units having magnetic starters with respective electric heating units. Each control circuit includes at least six temperature pickups placed in monolithic construction and pickup for measuring temperature of environmental air. Said pickups are connected with inlets of respective programmed heat regulator for supplying control signals.
EFFECT: enhanced quality of constructions.
3 cl, 4 dwg
FIELD: apparatus or processes for treating or working, namely curing, setting or hardening, the shaped articles.
SUBSTANCE: method for gypsum panel forming involves shaping the panel, hardening and hydrating thereof and drying the panel during panel rotation. Device to realize above method is also disclosed.
EFFECT: increased panel quality, decreased production and maintenance costs and improved operating conditions.
20 cl, 11 dwg
FIELD: building, particularly for concreting cast-in-place and precast reinforced concrete structures along with concrete curing temperature regulation.
SUBSTANCE: method involves laying and compacting concrete mix under continuous concrete mix curing temperature control; heating central concrete layers with heating reinforcement when outer concrete layers are in elasto-plastic state. Heating reinforcement is spaced a distance "a" from surface. The heating is carried out simultaneously with surface heat-shielding. Distance "a" is determined as a=δeq(tav-ts)/(ts-ta), m, where δeq - thickness of conditional equivalent concrete layer corresponding to surface thermal resistance, Rs, m; tav - time-average concrete temperature calculated by estimated time of heating directly in heating area, deg; ts - time-average temperature at concrete surface calculated by estimated heating time, deg; δeq is determined as δeq=Rs·λ·F, m, where Rs is heat resistance of rigging with form Rr including thermal resistance Ra of heat transfer from rigging to ambient air, h·deg/kcal; Rs=Rr+Ra=(δr/( λr·F))+(1/(α·F)), h·deg/kcal, where δr is thickness of rigging, m; λr is rigging heat conductivity factor kcal/(m·h·deg), α is rigging surface heat-transfer coefficient kcal/(m2·h·deg), λ is concrete(reinforced concrete) heat conductivity kcal/(m·h·deg); F=1m2 - rigging surface area for thermal resistance calculation, m2. Amount of heat Q used to heat part of member to be heated having length (height) of 1.0 m and cross-sectional width of 1.0 m is determined from Q=(tav-ts)(m+(τ·λ·F/a), where m is constant equal to 60-180 kcal/deg and τ is calculated heating time, hours. The heating reinforcement is heating wires or pipes adapted for hot water circulation.
EFFECT: reduced temperature stresses and prevention of crack formation during structure concreting, as well as possibility to regulate curing temperature.
4 cl, 1 ex, 4 dwg
FIELD: method and equipment for manufacturing gypsum plates.
SUBSTANCE: method involves the following steps: first step includes molding plate; second step includes hardening by hydration process until hydrated article is produced with hydration extent within the range from 33% to 80%; third step includes continuing hydration process in at least one rotating drum by rotating plate around central axis; fourth step includes drying process. Intermediate cutting process may be provided between second and third steps, said cutting process may be effectuated in accordance with wire principle. Apparatus has linear zone for partial hardening and hydration, and at least one hydration drum comprising central axis around which multiplicity of branches are arranged. Each branch in drum may be divided into multiplicity of levers, with surface of said levers making from about 50% to about 99% the surface of respective branch. Drum may have from 10 to 150 branches, preferably from 40 to 120 branches. Hardening and hydration zone and drum may be arranged in two axes extending in parallel with one another.
EFFECT: improved quality of articles, improved maintenance and operating conditions.
12 cl, 11 dwg
FIELD: building industry; methods of production of the construction products at the building industry works.
SUBSTANCE: the invention is pertaining to the field of building industry, in particular, to the method of production of the construction products at the building industry works and may be used for manufacture of the reinforced concrete, including the spatial structures with the heat-insulating layer. The technical result of the invention is reduction of the power input, improvement of the quality and expansion of list of products. The method of manufacture of double-layer reinforced concrete products includes the consecutive formation of the constructive and the heat-insulating layers of the reinforced concrete and its thermal treatment. The heat-insulating layer with the average density of 450-500 kg/m3 made out of the vermiculite-concrete mixture with flowability of 3-5 cm is molded by the vibrobeam with the simultaneous its reinforcement by the woven net in top level. After the structure achieves the plastic strength of 0.015-0.025 MPa, then begin the molding the constructive layer and conduct the thermal treatment by the method of the contact heating from the side of the heat-insulating layer.
EFFECT: the invention ensures reduction of the power input, improvement of the quality and expansion of list of products.
FIELD: construction, particularly devices for thermal treatment of reinforced structures during in-situ structure erection with the use of automatic temperature condition control means.
SUBSTANCE: device comprises form, heat-sensing means, heaters and computer. Heat-sensing means are placed in form. Heaters are laid on reinforcing cage of monolithic reinforced concrete structure and fixed thereto. Heat-sensing means are linked to automatic digital power regulator including indication and control unit and digital control unit connected with control computer by means of signal converter. To provide visual control automatic power regulator is provided with concrete temperature display panel, which indicates concrete temperature in each measurement point and volumetrically weighed average concrete temperature.
EFFECT: decreased power inputs and possibility to control thermal field transformation after heater switching-on or switching-off in correspondence with thermal limiters of valid regulation documents.
2 cl, 3 dwg
SUBSTANCE: method for strengthening treatment of concrete products includes exposure of alternating rotary magnetic field with specified value of its intensity and frequency at components used in composition of initial concrete mix, when exposure of alternating rotary magnetic field is provided for all components making concrete without exception after their combination into integral volume directly in the product item itself after realisation of initial mixture components curing operation. This exposure is realised in moulded product without its extraction from used curb. The item itself performs function of closing connecting link in magnetic circuit used for generation of field. Treatment is carried out at intensity of alternating magnetic field 1×104-3×106 a/m; range of its frequencies 20-70 Hz for 1.5-4.5 hours. Cycles of treatment are repeated twice: in 160-180 hours with a delay of 0.3-0.7 hr and in 480-500 hours with a delay of 0.1-0.2 hour. Device used to realise the method comprises circuit developing alternating magnetic field and electric windings-coils mounted on it and connected to external source of AC current supply. One of plates making magnetic conducting circuit has through slot, dimensions of which make it possible to install the concrete product itself in it together with curb used for its moulding, and its body when installed in circuit serves as closing connecting link that closes magnetic flow generated in it.
EFFECT: improved strength characteristics used to erect objects of concrete building structures.
2 cl, 2 dwg, 3 ex
FIELD: process engineering.
SUBSTANCE: invention relates to construction and may be used for curing concrete articles. Proposed curing room comprises walls with inner flange, hydraulic gate frame mounted on wall edges, shield with inner surface provided with steam-and-water insulation coating and heat insulation, steam duct, and condensate drain chute. Hydraulic gate frame is made up of horizontal channels arranged horizontally along room walls to house elastic porous material for room sealing by absorbing condensed steam. Aforesaid shield is made up of carcass consisting of weight-reduced channels coated by heat-insulation material with inner cavities. Said shield serves to press elastic porous material against all edges of channel cavity.
EFFECT: high-reliability sealing.
2 cl, 6 dwg