CN208937473U - A kind of large-sized concrete impermeability test test specimen cover die - Google Patents

Abstract

The utility model discloses a kind of large-sized concrete impermeability test test specimen cover die, cover die uses movable floor, including cover die pedestal, cover mould body, movable floor, flange, set mould body presents the hollow pyramidal of lower end opening, there are upper edge and lower opening's edge respectively at the upper and lower port of set mould body, it is bolted between the lower opening's edge and cover die pedestal, it is bolted between the upper edge and flange, the pre-embedded bolt for protruding into cover die body interior is equipped on flange, movable floor coincide at the lower port that set mould body is arranged in, the threeway being connected to the cavity of set mould body is equipped in cover die the middle of the base, test specimen is convenient in demoulding and test piece maintenance completion removes movable floor and carries out permeability test, save secondary seal, it is convenient to operate.

Description

A kind of large-sized concrete impermeability test test specimen cover die

Technical field

The utility model belongs to concrete impermeability test apparatus field, specifically a kind of large-sized concrete impermeability test examination Part cover die.

Background technique

Water-tight concrete is widely used in water conservancy project, underground and other civil engineerings for having seepage resistance demand, such as dam coagulation Soil, tunnel support concrete etc., impermeability refer to material used in building in the effect of water or other medium pressure liquids The lower ability for resisting infiltration, concrete permeability resistance are the important indicator for reflecting endurance performance of concrete, and building, water conservancy, people The key index of the domain engineerings quality such as anti-, high-speed rail, road and bridge.

Currently, before test specimen press-in die, being needed coagulation when measuring concrete sample anti-permeability performance using Anti-leakage instrument Sealant is smeared in native test specimen cover die side, and concrete sample side is fully sealed with die trial inner wall contact surface, it is ensured that hydraulic pressure increases Added-time test specimen side is not permeated, and according to the literature, common encapsulating method is broadly divided into three kinds: (1) heating seal method: main It is to be sealed with rosin blend or butter with talc mixture using paraffin, also has using glass silica gel, waterproof painting Material, Special seal cream and rubber sleeve and rubber band sealing, the above sealing will could use after high temperature melting, a. from Time and at seeing originally, heat seal die method needs to melt in paraffin and rosin heating, and die trial is also required to be preheated with baking oven, heated Journey time-consuming removal is hardened more than half an hour, and when demoulding paraffin and rosin is also relatively time-consuming, needs again when testing next time Paraffin and rosin heating are melted, whole process takes a long time, cost is larger, not applicable to large mold；B. from complexity On see, heating die trial needs very careful, and in particular for grasping temperature, this process testing personnel are not easy to control, are easy Cause to seal bad, test specimen periphery just will appear infiltration when hydraulic pressure is not added to specified value, need to reseal, and cause to do over again； When die trial is subcooled, test specimen enters mould because sealer end drawing crack will occur in facing melting state, sealer, connects with die trial inner wall Touching owes close, is likely to poor sealing occur otherwise temperature is excessively high, and sealer melts rapidly and overflows end face, causes in mould Filler is on the low side, influences airtight quality die trial simultaneously because thermal volume expansion increases, and test specimen stamping die is deeper, as die trial is cooling It shrinks and test specimen is backed off again, if being possible to for test specimen to be pressed into two sections in test progress；C. from the point of view of environmental sanitation, heat seal die The paraffin and rosin of method fusing, volatile matter is not only unpleasant but also also harmful to human body, and die trial needs to be heated with baking oven, holds It easily scalds one's hand and damages clothing, also needed sometimes in pressure process plus water is cooling, be easy corrosion pressurized equipment, environmental sanitation is poor； D. from seepage-resistant grade, high-impermeable grade is difficult to meet；(2) cold Sealing Method: including selecting polymer cement-based waterproof series of strata JS complex waterproof layer, selection rubber sleeve in column are fabricated to the concrete impervious rubber seal of seal sleeve, tri-coupling type, using examination Mould inner wall gather sealing shallow slot, using epoxy resin daub as sealing material etc., above-mentioned sealing material and die trial all do not need Heating, primary stock is used multiple times, easy to operation, and demoulding is relatively labor-saving, and cleaning die trial is also easier；But it belongs to The impervious sealing of small-size test piece, have no large scale test specimen impermeability test sum number it is reported that anti-hyperosmosis effect have it is to be tested, (3) increase pre-buried pressure guiding pipe in test specimen, " Civil Engineering Material test is with innovation-by taking cement concrete impermeability test as an example " One text proposes appropriate increase concrete sample size, increases the key measures such as internal pre-buried pressure guiding pipe, intuitively watches infiltration path, Improve the success rate of impermeability test, but be disadvantageous in that internal pre-buried pressure guiding pipe enlarged footing it is suitable for reading for 60 mm of diameter, it is high by 20 The horn mouth of mm, lower mouth and the same diameter of pre-buried pressure guiding pipe, this method test localized seepage's water to the permeability test of concrete, hardly possible To represent large area hydraulic pressure to gunite concrete large area water test.

In conclusion the sealing that the above different types of encapsulating method solves common impermeability test to a certain extent is wanted Ask, but solving large scale test specimen, still remain to be discussed and verify in terms of hyperosmosis, in addition, frequently with direct-injection iron cover die at The method of type impervious test piece differs greatly with large area shotcrete construction condition, and the injection molding in small area cover die Test specimen, test specimen quality be not easy to guarantee, be difficult successfully to carry out impermeability test, our proposed adoptions spray big board concrete mould at Type method guarantees that material for test characteristic closer to the actual conditions of large area gunite concrete, obtains more accurate, reliable Impervious data.

Summary of the invention

In order to solve the problems in background technique, the utility model discloses a kind of System for Large-scale Specimen cover die, and set mould body is cone Mesa-shaped, cover die use movable floor, and test specimen is convenient in demoulding and test piece maintenance completion removes movable floor and carries out permeability test, is saved Secondary seal is removed, it is convenient to operate.

In order to achieve the above-mentioned object of the invention, the utility model uses technical solution as described below:

A kind of large-sized concrete impermeability test test specimen cover die, including cover die pedestal, set mould body, movable floor, flange, Set mould body presents the hollow pyramidal of lower end opening, has upper edge and lower opening's edge respectively at the upper and lower port of set mould body, It is bolted, is bolted between the upper edge and flange, in flange between the lower opening's edge and cover die pedestal It is equipped with the pre-embedded bolt for protruding into cover die body interior, movable floor coincide at the lower port that set mould body is arranged in, in cover die The middle of the base is equipped with the threeway being connected to the cavity of set mould body.

A kind of large-sized concrete impermeability test test specimen cover die, is circumferentially provided with several holes, hole on flange In be equipped with mandril.

A kind of large-sized concrete impermeability test test specimen cover die, the inner wall for covering mould body are pasted with line with rubber.

Due to using above technical scheme, the utility model has the following beneficial effects:

1. the utility model uses pyramidal set mould body, using the forming method of big board concrete mould, guarantee test specimen material Actual conditions of the material characteristic closer to large area gunite concrete；

2. the utility model uses movable floor, removes after bottom plate test specimen resets after the completion of test piece maintenance and directly permeated Test is saved secondary seal, while being demoulded convenient for test specimen；

3. pre-embedded bolt is arranged in top flange in the utility model, facilitate test specimen slings movement, is arranged in top flange Mandril demoulds convenient for test specimen.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

In figure: 1, cover die pedestal；2, mould body is covered；3, movable floor；4, flange；5, mandril；6, pre-embedded bolt；7, three It is logical.

Specific embodiment

By the following examples can the detailed explanation present invention, the open purpose of the present invention is intended to protect model of the present invention Enclose all interior technological improvements.

A kind of large-sized concrete impermeability test test specimen cover die in conjunction with described in attached drawing 1, including cover die pedestal 1, set mould body 2, movable floor 3, flange 4, set mould body 2 is hollow pyramidal in upper and lower side opening, in the upper and lower port punishment of set mould body 2 Do not have upper edge and lower opening's edge, be bolted between the lower opening's edge and cover die pedestal 1, the upper edge and flange 4 it Between be bolted, be equipped on flange 4 and protrude into the pre-embedded bolt 6 of cover die body interior, the setting that coincide of movable floor 3 is covering At the lower port of mould body 2, the threeway 7 being connected to the cavity of set mould body 2 is equipped in the middle part of cover die pedestal 1.

The large-sized concrete impermeability test test specimen cover die, several holes are circumferentially provided on flange 4, are worn in hole Equipped with mandril 5, when test specimen demoulding is bad, can spinning mandril 5 help test specimen to be detached from, can easily, quickly by concrete test block It is detached from mold.

The inner wall of the large-sized concrete impermeability test test specimen cover die, set mould body 2 is pasted with line with rubber.

The application method of the utility model is as follows:

At the construction field (site), first the utility model is placed on station, the gunite concrete preparation directly into set mould body 2 Concrete sample unclamps the lower opening's edge and set of set mould body 2 after the completion of test material preparation is got well and conventional maintenance method is used to conserve Bolt is connected between mould pedestal 1, while pre-embedded bolt 6 and flange 4 fasten, test specimen and set mould body 2 in lifting is prevented to be detached from, After lifting, movable floor 3 is removed, test specimen and set mould body 2 are pressed fixation in situ after falling after rise, thus left empty into water pressure testing Between, the threeway 7 being arranged in the middle part of cover die pedestal 1 after dismounting movable floor 3 is connected to the cavity of set mould body 2, can directly be carried out Permeability test, using the method for existing impermeability test, test specimen is demoulded after the completion of test, can spinning top when test specimen demoulding is bad Bar 5 helps test specimen to be detached from set mould body 2.

The non-detailed portion of the utility model is the prior art.

Claims (3)

1. a kind of large-sized concrete impermeability test test specimen cover die, it is characterised in that: including cover die pedestal (1), set mould body (2), movable floor (3), flange (4), set mould body (2) is hollow pyramidal in upper and lower side opening, in the upper of set mould body (2) There are upper edge and lower opening's edge at lower port respectively, is bolted between the lower opening's edge and cover die pedestal (1), it is described suitable for reading It is bolted between edge and flange (4), the pre-embedded bolt (6) for protruding into cover die body interior, activity is equipped on flange (4) Bottom plate (3) coincide setting at the lower port of set mould body (2), and the sky with set mould body (2) is equipped in the middle part of cover die pedestal (1) The threeway (7) of chamber connection.

2. a kind of large-sized concrete impermeability test test specimen cover die according to claim 1, it is characterised in that: in flange (4) several holes are circumferentially provided on, Kong Zhongjun is equipped with mandril (5).

3. a kind of large-sized concrete impermeability test test specimen cover die according to claim 1 or 2, it is characterised in that: cover die The inner wall of ontology (2) is pasted with line with rubber.