CN101314239A

CN101314239A - Concrete casting maintaining process of concrete product

Info

Publication number: CN101314239A
Application number: CNA2008100243440A
Authority: CN
Inventors: 李多根; 杨多林; 沈华春
Original assignee: SUZHOU UUGWST SPECIAL CEMENT PRODUCTS CO Ltd
Current assignee: SUZHOU UUGWST SPECIAL CEMENT PRODUCTS CO Ltd
Priority date: 2008-05-21
Filing date: 2008-05-21
Publication date: 2008-12-03

Abstract

The invention relates to a process for maintaining a concrete product, namely, cast concrete. Before concrete is cast in a mould, firstly a layer of film is laid in the inner surface of the used mould and the film completely covers the inner surface of the mould; after the concrete is formed and demoulded, the film is connected with the concrete product together so as to protect water in the concrete from evaporating. The process makes the concrete harden in moist condition so as not to need special maintenance, thereby saving a great deal of manpower and water resource.

Description

A kind of concrete casting maintaining process of concrete product

Technical field

The concrete casting maintaining process that the present invention relates to various build concrete goods is particularly related to underground piping inspection shaft and sewage, the well seat of catch-basin and the concrete casting maintaining process of well lid plate such as municipal works, water, electricity, communication, coal gas, petrochemical industry.

Background technology

Traditional concrete casting concrete technology program is that concrete stirs, builds, curing and demolding, maintenance.Along with developing by leaps and bounds of building industry, concrete product status under construction seems more and more important all the more, the maintenance of cement products becomes a significant problem that can not be ignored, and it directly has influence on the life-span and the security of building, has become one of very important problem in the construction.The method that traditional concrete curing method adopts grass (fiber crops) bag to wait the oversite concrete surface and water usually, this method water consumption is big, the labour intensity height; Also exist grass (fiber crops) bag to be easy to rot simultaneously, the life-span is short, pollute concrete surface, can't construct winter and be easy to cause shortcoming such as fire.And a lot of construction enterprises attach great importance to not enough to the natural curing of cement products, think that the concrete goods are just passable as long as often water a little water, cannot not water fixingly every day, though set up the special messenger to water, but do not have the special messenger to supervise, make cement products finally not reach its due intensity.China (GB50204-2002) stipulates " should be covered and moisture-keeping maintaining concrete " about the natural curing of cement products in the 12h that builds after finishing by " concrete structure engineering construction quality acceptance specification ", it is hardened under moistening condition.At the sclerosis initial stage, cement products, is not often resisted Free water evaporation and temperature and is reduced the stress that produces, and early crack occurs as untimely maintenance because tensile strength is low; Even early stage dehydration, influence normally carrying out of cement solidification.

Summary of the invention

The objective of the invention is a kind of new process program that proposed at the existing defective of above-mentioned concrete casting maintaining process of concrete product, use the cement products of concrete that this method is watered to need not to carry out water seasoning, on the basis that guarantees the cement products quality, saved great amount of water resources and manpower.

Its technical process is: 1. concrete stirs: with cement, sand, stone and water and additive, filler proportion stir stand-by; 2. pad pasting: with thickness is that the film that has of 0.03mm-0.5mm is applied ointment or plaster at the used concrete mould inner surface that waters, and guarantees that film press table shape covering mould inner surface in the mould; 3. build: the concrete that stirs is directly watered concrete in the mould that posts film, be vibrated to concrete with vibrator and fill up mould fully, the reconditioning feeding port; 4. the demoulding: after waiting concrete formation or curing, mould is taken off.

When having film to the mould inner surface shop, film size should be consistent with the mould inner surface area or greater than inner surface area, the film that has more during greater than inner surface area should stretch out outside the mould, and the film that stretches out after waiting to have built should cover mould upper surface (being sprue) fully.Can reach complete closed like this and play better sealing effectiveness.

The concrete product of technology made according to the present invention because of post film in goods pouring front mold, treats that product molding gets final product the demoulding, solidifies needed time faster production thereby can save concrete products such as generally watering concrete technology.Goods demoulding rear film can be attached to the concrete product surface, moisture in the concrete product just can not evaporate like this, thereby both can keep the required moisture of cement to avoid every day, and play and both saved the benefit that water resource is also saved manpower to the program that concrete surface waters.Thereby can keep concrete humidity can reach better hardness in this way owing to making in addition.Intensity can improve 30%, can be transported to after products solidifying is good to use the building site, uses on the building site and need not to carry out water seasoning again.

Description of drawings

The present invention is described in further detail below in conjunction with accompanying drawing

Cutaway view behind Fig. 1 well seat mould paving plastic film

The cutaway view that the grouting of Fig. 2 mould is later

Cutaway view when Fig. 3 well seat solidifies

The cutaway view of well seat after Fig. 4 demoulding

Fig. 5 well seat vertical view

Cutaway view behind Fig. 6 steel fiber reinforced concrete rain grate cover mould paving plastic film

The cutaway view that the grouting of Fig. 7 steel fiber reinforced concrete rain grate cover mould is later

Cutaway view when Fig. 8 steel fiber reinforced concrete rain grate cover solidifies

The cutaway view of steel fiber reinforced concrete rain grate cover after Fig. 9 demoulding

Figure 10 steel fiber reinforced concrete rain grate cover vertical view

The specific embodiment

Below in conjunction with accompanying drawing, introduce the embodiment of the invention in detail

Fig. 1 is to the concrete technology process of watering of the well seat that Figure 5 shows that a well lid (comprising well seat and cover plate), and the back that stirs of at first cement, sand, stone and water and additive, filler being proportioned is stand-by.As shown in Figure 1 plastic sheeting 12 is applied ointment or plaster at mould 11 inner surfaces then, thereby film 12 size is consistent with mould 11 inner surface areas or be a bit larger tham inner surface area assurance plastic sheeting 12 and should cover mould 11 inner surfaces fully.For guarantee well seat 13 smooth surface plastic sheeting surfaces 12 should be smooth, no wrinkle, no bubble, free from dust particle etc. are mingled with.As shown in Figure 2 the concrete 13 that stirs is directly watered concrete in the mould 11 that posts film after plastic sheeting 12 is completed, be vibrated to concrete with vibrator and fill up mould fully, the reconditioning feeding port.Then as shown in Figure 3 with the instant demouldings in mould 11 upset back or treat mould inner concrete 13 curing and demolding; plastic sheeting 12 meetings and well seat 14 connected together and broke away from as shown in Figure 4 from mould this moment; though well seat 14 upper surfaces are not covered by plastic sheeting; but because of the upset of grinding tool when the demoulding; thereby upper surface can not be exposed in the air, and plastic sheeting plays the effect that moisture is not evaporated in the protection concrete.

Fig. 6 at first also is stand-byly to be applied ointment or plaster nylon film at mould inner surface then in the proportion back that stirs of cement, sand, stone, water, steel fibre and additive, filler to the concrete technology process of watering that Figure 10 shows that a steel fiber reinforced concrete rain grate cover, should guarantee that as shown in Figure 6 nylon film 16 covers mould 15 inner surfaces fully, and some stretches out the mould outside film, stretches out area and can guarantee the mould upper surface is covered fully.For guarantee concrete product smooth surface nylon film surface should be smooth, no wrinkle, no bubble, free from dust particle etc. are mingled with.The concrete 17 that just stirs after nylon film 16 is completed as shown in Figure 7 then directly waters concrete in the mould 15 that posts film, be vibrated to concrete with vibrator and fill up mould fully, behind the reconditioning feeding port, the nylon film 16 that will stretch out mould covers on mould 15 upper surfaces, for guarantee concrete product smooth surface nylon film 16 surfaces should be smooth, no wrinkle, no bubble, free from dust particle etc. are mingled with.As Fig. 8 with die flip after; the instant demoulding or treat concrete 17 curing and demolding; nylon film 16 meetings and well lid 18 connected together and broke away from from mould 15 this moment; and well lid 18 fully by nylon film 16 parcels as shown in Figure 9, thereby make nylon film play the effect that moisture is not evaporated in the protection concrete.

Claims

1. concrete casting maintaining process of concrete product; before this concrete was stirred; then with concreting in mould; it is characterized in that: before building; earlier lay thin film by the die surface shape at mould inner surface; with the demoulding behind the demoulding or the forming and hardening after the whole real moulding of the concrete in the mould, will slough the concrete mould base that the external mold rear surface is wrapped in film at last and carry out maintenance after building.

2. according to the described concrete casting maintaining process of concrete product of claim 1, it is characterized in that mouth that described plastic sheeting is applied to mould along or described film some stretch out mould outside, extension can guarantee that mould is built mouth to be covered fully, thereby makes concrete mould base surface portion or whole adhesion film.

3. it is characterized in that according to claim 1 or 2 described concrete casting maintaining process of concrete product described technology is used for the concrete casting maintaining process of the well lid of underground piping inspection shafts such as municipal works, water, electricity, communication, coal gas, petrochemical industry and sewage, catch-basin.

4. it is characterized in that the concrete casting maintaining process of described technology according to claim 1 or 2 described concrete casting maintaining process of concrete product with the steel fiber reinforced concrete rain grate cover of sewage, catch-basin.