CN104441203A - Self-compacting concrete specimen production method and self-compacting concrete specimen production device - Google Patents
Self-compacting concrete specimen production method and self-compacting concrete specimen production device Download PDFInfo
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- CN104441203A CN104441203A CN201310425350.8A CN201310425350A CN104441203A CN 104441203 A CN104441203 A CN 104441203A CN 201310425350 A CN201310425350 A CN 201310425350A CN 104441203 A CN104441203 A CN 104441203A
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- compacting concrete
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/29—Producing shaped prefabricated articles from the material by profiling or strickling the material in open moulds or on moulding surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a self-compacting concrete specimen production method and a self-compacting concrete specimen production device. A funnel of the device is provided with a first end with a wide inlet and a second end with a narrow outlet, smooth oblique planes for enabling self-compacting concrete to flow downwardly smoothly are arranged between the first end and the second end, the center of the second end is flush with that of a specimen mould, a set distance is reserved between the second end and the upper edge of the specimen mould, and self-compacting concrete flows into the specimen mould at a time through the specimen production device. The self-compacting concrete specimen production method and the self-compacting concrete specimen production device have the advantages that the oblique planes of the device have fixed shapes and dip angles, a certain distance is reserved between the oblique planes and the specimen mould, and the self-compacting concrete flows into the specimen mould at a time through the device and flows into the specimen mould in the same way and at a consistent speed every time, so that strength data of specimens molded by production for many times are high in consistency and stability, and the produced specimens can truly reflect strength of self-compacting concrete subjected to pouring.
Description
Technical field
The present invention relates to preparation method and the producing device of self-compacting concrete test specimen, more particularly, relate to preparation method and the producing device of the self-compacting concrete test specimen adopting special funnel type.
Background technology
Ready-mixed concrete factory, precast concrete factory and adopt the concrete unit in charge of construction of on-the-spot concentrated compactness, all by national Specification, should be sampled concrete, make test specimen, evaluated the intensity of structural concrete by the intensity of test specimen.Therefore, strict standardized method and apparatus is needed to the specimen molding of self-compacting concrete, the test specimen made just can be made to keep the original performance characteristics of self-compacting concrete, the intensity of real reflection self-compacting concrete.
In the GB of " standard for test methods of mechanical properties of ordinary concrete " (GB/T50081), detailed standardized regulation is carried out to each step of the preparation method of normal concrete test specimen.Be divided into two kinds of concrete formation methods according to the denseness of concrete mix, the concrete that the slump is not more than 70mm should use vibration jolt ramming, and what be greater than 70mm should with the artificial jolt ramming of tamper.
When making test specimen with shake table jolt ramming, concrete mix is once loaded die trial, and when filling with substance application spatula plugs and pounds along each die trial wall, and makes concrete mix exceed die trial mouth; Die trial should be adhered to or be fixed on a vibration table, and during vibration, die trial must not have any beating, and till vibration should last till surperficial pulp, must not cross and shake.
Should carry out as follows with manually plugging and pounding making test specimen: concrete mix should divide in two-layer loading mould, and the charging thickness of every layer is roughly equal; Plug and pound and evenly should carry out from edge to center by the hand of spiral.When plugging and pounding bottom concrete, tamper should reach bottom die trial; When plugging and pounding upper strata, tamper inserts lower floor 20mm ~ 30mm after should running through upper strata; When plugging and pounding, tamper should keep vertical, must not tilt; Then spatula is applied along the plug of die trial inwall for several times.Every layer plugs and pounds number of times and must not be less than 12 times by 10000mm2 sectional area; Plug and pound rear application rubber hammer and knock die trial surrounding gently, until plugging and pounding till cavity that rod stays disappears.
Make test specimen with the jolt ramming of internal vibration rod should carry out as follows: concrete mix is once loaded die trial, and when filling with substance application spatula plugs and pounds along each die trial wall, and makes concrete mix exceed die trial mouth; Should be the internal vibration rod of 25mm with diameter, insert die trial when vibrating, vibrating spear be apart from die trial base plate 10mm ~ 20mm and must not touch die trial base plate, till vibration should last till surperficial pulp, and should avoid shaking, to prevent concrete disintegration; General vibrating time is 20 seconds, wants slowly, must not leave hole after extracting when vibrating spear is extracted; Strike off die trial unnecessary concrete suitable for reading, when concrete closes on initial set, floating with spatula.
But self-compacting concrete has good mobility and education resistance, relying on deadweight flowing when building, reaching without the need to vibrating closely knit.Carry out during shaping test piece vibrating or plugging and pounding operation, on the one hand shaping test specimen and engineering practice inconsistent, the Practical Project intensity of self-compacting concrete can not be objectively responded, on the other hand, vibrate or plug and pound and easily cause aggregate layering in concrete or segregation, cause the specimen molding failure of self-compacting concrete, the test specimen made like this cannot evaluate the intensity of self-compacting concrete truly.Therefore, above-mentioned normal concrete test specimen preparation method and be not suitable for self-compacting concrete.
The specimen molding of self-compacting concrete also has relevant regulation, i.e. " self-compacting concrete application technology code " (JGJ/T283).Preparation method provides as follows: the self-compacting concrete of sampling or laboratory's mixing, should be shaping as early as possible after mixing, no more than 15 minutes; Sampling or the good concrete mix of mixing should at least mix three times, reinstall container; At twice concrete mix should be loaded die trial, the charging thickness of every layer should be equal, midfeather 10 seconds, and concrete mix should exceed die trial mouth, should not use shake table or concrete vibrating mode shaping.Die trial unnecessary concrete suitable for reading should strike off, and floating with spatula.
But afore mentioned rules does not do detailed standardized regulation to method of operating, wherein self-compacting concrete loads the load mode difference of die trial, the speed of loading speed, also larger to the intensity effect of the test specimen made, test specimen makes quality and is subject to the impact of the personal experience of workman and practical operation larger, cause the intensity data difference of test specimen large, the coefficient of variation is high, cannot embody and evaluate the intensity of self-compacting concrete really.
Producing device and the preparation method of the test specimen being applicable to self-compacting concrete is lacked in prior art, the test specimen of self-compacting concrete can be made to make standardization more, convenient and swift, the apparent mass making test specimen is good, and the uniformity of intensity data is good, the intensity of self-compacting concrete better can be evaluated.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides producing device and the preparation method of a kind of stability of intensity data and the higher self-compacting concrete test specimen of uniformity.
The technical solution adopted for the present invention to solve the technical problems is: the preparation method constructing a kind of self-compacting concrete test specimen, comprises the following steps:
1) carry out stirring completely at least three times to self-compacting concrete to be sampled;
2) by stirring completely, self-compacting concrete splendid attire is to container, and the described self-compacting concrete of described container splendid attire is also greater than the volume of die trial (1);
3) funnel (2) is placed on the support (3) of support, the described self-compacting concrete of described container splendid attire is had from described funnel (2) first end (21) of a broad import is disposable lentamente to be poured into and flow out to die trial (1) with the second end (22) that described first end (21) has a narrow outlet along described funnel (2), the inclined-plane (23) making the downward smooth outflow of described self-compacting concrete is formed between described first end (21) and described the second end (22), the inner surface of described funnel (2) is smooth surface, is alignd with the center of die trial (1) in the center of the second end (22) of described funnel (2), described the second end (22) and described die trial (1) upper limb (11) interval one setpoint distance,
4) described self-compacting concrete fills up described die trial (1) and entirety exceeds the upper limb (11) of described die trial (1), strike off the described self-compacting concrete exceeding described die trial (1) upper limb (11), when described self-compacting concrete in described die trial (1) closes on initial set, with the floating upper surface of spatula.
The preparation method of self-compacting concrete test specimen of the present invention, the described self-compacting concrete in described step 1), comprises following component by weight: cement 340kg, flyash 140kg, medium sand 855kg, 5 ~ 20mm continuous grading rubble 840kg, water 170kg, additive 4.8kg.
The preparation method of self-compacting concrete test specimen of the present invention, described funnel (2) in described step 3) forms by rounding tapering (24) and with the cylindrical portion (25) of the connection of described rounding tapering (24), described first end (21) is arranged on the suitable for reading of described rounding tapering (24), described the second end (22) is arranged on the end opening of described cylindrical portion (25), described first end (21) diameter is 300mm, described the second end (22) diameter is 80mm, the height of described rounding tapering (24) is 300mm, the height of described cylindrical portion (25) is 80mm.
The preparation method of self-compacting concrete test specimen of the present invention, described step 2) in described die trial (1) the cube die trial (1) that is the 150mm length of side, be 10 seconds ~ 15 seconds by described self-compacting concrete from the described container time controling poured into described funnel (2) in described step 3).
The preparation method of self-compacting concrete test specimen of the present invention, described step 2) in described die trial (1) be diameter 160mm, the cylindrical die trial (1) of height 320mm, be 20 seconds ~ 30 seconds by described self-compacting concrete from the described container time controling poured into described funnel (2) in described step 3).
The producing device of self-compacting concrete test specimen of the present invention, comprise die trial (1) and container, also comprise funnel (2) and the support (3) for funnel described in support (2), described funnel (2) has the first end (21) of a broad import and the second end (22) of a narrow outlet, the inner surface of described funnel (2) is smooth surface, the inclined-plane (23) for making the downward smooth outflow of described self-compacting concrete is provided with between described first end (21) and described the second end (22), align with the center of described die trial (1) and described the second end (22) and described die trial (1) upper limb (11) interval one setpoint distance in the center of described the second end (22), the volume of described container is greater than the volume of described die trial (1).
The producing device of self-compacting concrete test specimen of the present invention, described funnel (2) forms by rounding tapering (24) and with the cylindrical portion (25) of the connection of described rounding tapering (24), described first end (21) is arranged on the suitable for reading of described rounding tapering (24), and described the second end (22) is arranged on the end opening of described cylindrical portion (25).
The producing device of self-compacting concrete test specimen of the present invention, described first end (21) diameter is 300mm, and described the second end (22) diameter is 80mm, and the height of described rounding tapering (24) is 300mm, and the height of described cylindrical portion (25) is 80mm.
The producing device of self-compacting concrete test specimen of the present invention, described setpoint distance is 100mm ~ 200mm.
The producing device of self-compacting concrete test specimen of the present invention, described support (3) is provided with moveable base (31).
Implement preparation method and the producing device of self-compacting concrete test specimen of the present invention, flow in die trial under self-compacting concrete in container is disposable by funnel, funnel has the first end of a broad import and the second end of a narrow outlet, the inclined-plane for making the downward smooth outflow of self-compacting concrete is provided with between first end and the second end, the inner surface of funnel is smooth surface, aligns with the center of die trial and the second end and die trial upper limb interval one setpoint distance in the center of the second end.Preparation method and the producing device of self-compacting concrete test specimen of the present invention have following effect: the inclined-plane of funnel has fixing shape and angle, and and die trial interval one setpoint distance, self-compacting concrete in container is poured in die trial by funnel is disposable, each self-compacting concrete load mode is consistent, loading speed is also consistent, make each intensity making shaping test specimen have good uniformity and stability, the intensity of the test specimen obtained can reflect really actual self-compacting concrete build after intensity.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic diagram of the producing device of self-compacting concrete test specimen of the present invention;
Fig. 2 is front view and the top view of the funnel of the producing device of self-compacting concrete test specimen of the present invention.
In figure,
1 die trial 2 funnel 3 support
11 upper limbs
21 first end 22 the second end 23 inclined-planes
24 cylindrical portion 26 support portion, rounding taperings 25
31 bases
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast the detailed description of the invention that accompanying drawing describes the producing device of self-compacting concrete test specimen of the present invention in detail.
The producing device of the self-compacting concrete test specimen of the present embodiment comprises die trial 1, container (not shown), funnel 2, for the support 3 of funnel described in support 2.Wherein container is used for splendid attire and has stirred self-compacting concrete completely, and for ensureing that self-compacting concrete can disposablely be poured in die trial 1, the volume of container is greater than the volume of die trial 1.Funnel 2 has the first end 21 of a broad import and the second end 22 of a narrow outlet, for making the inclined-plane 23 of the downward smooth outflow of self-compacting concrete between first end 21 and the second end 22, the inner surface of funnel 2 is smooth surface, aligns with the center of die trial 1 and the second end 22 and die trial 1 upper limb 11 interval one setpoint distance in the center of the second end 22.Container splendid attire has stirred self-compacting concrete completely, is poured into by self-compacting concrete in funnel 2, and self-compacting concrete flows down in die trial 1 along the inclined-plane 23 of funnel 2.Die trial 1 is standard die trial, such as, and the cube die trial 1 of the 150mm length of side, the cylindrical die trial 1 of diameter 160mm, height 320mm.
The producing device of the self-compacting concrete test specimen of the present embodiment, self-compacting concrete in container flows to down in die trial 1 smoothly by funnel 2 is disposable, the inclined-plane 23 of funnel 2 has fixing shape and inclination angle, and and the die trial 1 interval one setpoint distance height that then self-compacting concrete falls is consistent, the self-compacting concrete test specimen load mode of so each making test specimen is consistent, the loading speed of self-compacting concrete also can be consistent, each intensity making shaping test specimen is made to have good uniformity and stability, the intensity of the test specimen obtained can reflect really actual self-compacting concrete build after intensity.
Funnel 2 in the present embodiment forms by rounding tapering 24 and with the cylindrical portion 25 of the connection in rounding tapering 24, and first end 21 is arranged on the suitable for reading of rounding tapering 24, and the second end 22 is arranged on the end opening of cylindrical portion 25.Understandable, the enclosing part that funnel 2 can be enclosed by four inverted trapezoidals and square tube connect to form, as long as have the funnel 2 that can make the smooth and easy dirty inclined-plane 23 of self-compacting concrete, all belong to protection scope of the present invention.
The diameter of the first end 21 of the funnel 2 of the present embodiment is 300mm, and guaranteeing has enough width toppling over self-compacting concrete with container; The diameter of the second end 22 is 80mm, ensure self-compacting concrete test specimen make efficiency on the one hand, guarantee that self-compacting concrete can not be scattering into outside die trial in dropping process on the other hand, the height in rounding tapering 24 is 300mm, make the inclination angle of circular cone larger, self-compacting concrete can quickly through the second end 22, and load in die trial, the height of cylindrical portion 25 is 80mm.The volume of this funnel 2 is about 9.5L, is suitable for making all standard specimens and non-standard test specimen in " standard for test methods of mechanical properties of ordinary concrete " (GB50081-2002).
The producing device of the self-compacting concrete test specimen of the present embodiment, support 3 is level altitude, and funnel 2 is by support 3 support, and the second end 22 of funnel 2 and the setpoint distance at die trial 1 upper limb 11 interval are 100mm ~ 200mm.Due to the characteristic of self-compacting concrete self, if height of drop is too high, easily cause the aggregate layering in self-compacting concrete or segregation, cohesiveness declines, finally cause the intensity of self-compacting concrete test specimen to decline, the intensity of self-compacting concrete cannot be reflected really.Further define the height of drop of self-compacting concrete, in this altitude range, self-compacting concrete still keeps good uniformity.Fixing with highly relative to the position of die trial 1, during so each making test specimen, the height of drop that self-compacting concrete is flow in die trial 1 by funnel 2 is also relative fixing with position, also makes to make shaping test specimen at every turn and has good uniformity.
The producing device of the self-compacting concrete test specimen of the present embodiment, the outer surface in the rounding tapering 24 of funnel 2 is also provided with support portion 26, support portion 26 can be the fin of annular, also can be two symmetrically arranged projections, support portion 26 is in the circumferentially same of rounding tapering 24, support 3 supports and makes the height of funnel 2 fix on the support part 26, and the center of the second end 22 of funnel 2 can keep vertical, makes self-compacting concrete can the whereabouts of vertical direction.
The producing device of the self-compacting concrete test specimen of the present embodiment, funnel 2 can be made up of metal material in addition to aluminum or plastic material.
The producing device of the self-compacting concrete test specimen of the present embodiment, support 3 is provided with moveable base 31, when complete a test specimen shaping after, by traversing carriage 3 base 31, funnel 2 is moved to the position of next die trial 1, because support 3 is level altitude, the second end 22 of funnel 2 is also relatively fixing to the interval height of die trial 1 upper limb 11, only need, by funnel 2 end opening just to the center of next die trial 1, just to carry out the shaping making of next part test specimen very easily.
Adopt the producing device of self-compacting concrete test specimen of the present invention, load in die trial 1 by self-compacting concrete by fixing funnel 2, each load mode is all fixing, and loading speed is also consistent, the test specimen at every turn obtained also has good uniformity, and intensity obtains stable guarantee; Further limited the height of funnel 2 by support 3, the while of making the cohesiveness of self-compacting concrete guaranteed, make again loading speed be consistent, further reduce the deviation of each test specimen made, test specimen has better uniformity.
Self-compacting concrete in the preparation method of self-compacting concrete test specimen of the present invention, comprise following component by weight: cement 320kg ~ 350kg, flyash 120kg ~ 150kg, medium sand 840kg ~ 870kg, 5-20mm continuous grading rubble 830kg ~ 850kg, water 165kg ~ 175kg, additive 4.6kg ~ 5.0kg.Wherein, raw-materially to select:
Cement: adopt P.II42.5 portland cement, Zhujiang Cement;
Flyash: selection by winnowing I grade of flyash.
Fine aggregate: adopt the self-produced medium sand of Yangjiang Nuclear Power sandstone processing factory, modulus of fineness 2.6-2.8;
Coarse aggregate: adopt the self-produced rubble of Yangjiang Nuclear Power sandstone processing factory, particle diameter is that 5-20mm continuous grading is broken
Stone.
Additive: the thickening plasticity-maintaining type High-efficiency polycarboxylic acid water reducer adopting Xi Ka Chinese architecture Materials Co., Ltd
（Sika Viscocrete3301HD）；
Water: adopt drinking water.
The performance indications of self-compacting concrete of the present invention are excellent, and wherein divergence is 650mm ~ 700mm, to be greater than 320mm, V-type funnel be 5S ~ 15S by the time to U-shaped packed height.
Now two detailed description of the invention of the preparation method of self-compacting concrete test specimen of the present invention are described in detail.
Embodiment one: the columniform die trial 1 adopting diameter 160mm, height 320mm
Comprise the following steps:
1) carry out stirring completely at least three times to self-compacting concrete to be sampled.
2) by stirring completely, self-compacting concrete splendid attire is to container, and the self-compacting concrete of container splendid attire is greater than the volume of die trial 1.
3) funnel 2 is placed on the support 3 of the support of level altitude, funnel 2 has the first end 21 of a broad import and the second end 22 of a narrow outlet, funnel 2 forms by rounding tapering 24 and with the cylindrical portion 25 of the connection in rounding tapering 24, first end 21 is arranged on the suitable for reading of rounding tapering 24, the second end 22 is arranged on the end opening of cylindrical portion 25, the inner surface of funnel 2 is smooth surface, the inclined-plane 23 in rounding tapering 24 makes the downward smooth outflow of self-compacting concrete, first end 21 diameter is 300mm, the second end 22 diameter is 80mm, the height in rounding tapering 24 is 300mm, the height of cylindrical portion 25 is 80mm, is alignd with the center of die trial 1 in the center of the second end 22 of funnel 2, the second end 22 and die trial 1 upper limb 11 interval one setpoint distance 100mm ~ 200mm, the self-compacting concrete of container splendid attire is poured into from the first end 21 of funnel 2 is disposable lentamente and is flowed out to die trial 1 with first end 21 along the second end 22 of funnel 2, self-compacting concrete is 20 seconds ~ 30 seconds from the time controling that container is poured into funnel 2.
4) self-compacting concrete drops in die trial 1 by funnel 2, self-compacting concrete fills up die trial 1 and the overall upper limb 11 exceeding die trial 1, strike off the self-compacting concrete exceeding die trial 1 upper limb 11, when the self-compacting concrete in die trial 1 closes on initial set, with the floating upper surface of spatula.
The self-compacting concrete of the present embodiment, comprise following component by weight: cement 320kg, flyash 120kg, medium sand 870kg, 5-20mm rubble 850kg, additive 4.6kg, water 175kg, in performance indications, slump flow test is 665mm, T50 is 2.97S, U-shaped packed height is 320mm, and V-type funnel is 8.9S by the time.
Embodiment two: the cube die trial 1 adopting the 150mm length of side
Comprise above-mentioned same step, unlike in step 3), self-compacting concrete is 10 seconds ~ 15 seconds from the time controling that container is poured into funnel 2.
Preparation method in two embodiments, all should not use shake table or concrete vibrating mode to carry out shaping to test specimen.By the preparation method of two embodiments, have the funnel 2 at definite shape and inclination angle and the height distance of funnel 2 and die trial 1 is certain by using, load mode and loading speed are consistent, finally shaping test specimen, uniformity and the stability of intensity are better.
The self-compacting concrete of the present embodiment, comprise following component by weight: cement 350kg, flyash 150kg, medium sand 840kg, 5-20mm rubble 830, additive 5.0kg, water: 165kg, in performance indications, slump flow test is 670mm, T50 is 2.67S, U-shaped packed height is 320mm, and V-type funnel is 9.38S by the time.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (10)
1. a preparation method for self-compacting concrete test specimen, is characterized in that, comprises the following steps:
1) carry out stirring completely at least three times to self-compacting concrete to be sampled;
2) by stirring completely, self-compacting concrete splendid attire is to container, and the described self-compacting concrete of described container splendid attire is also greater than the volume of die trial (1);
3) funnel (2) is placed on the support (3) of support, the described self-compacting concrete of described container splendid attire is had from described funnel (2) first end (21) of a broad import is disposable lentamente to be poured into and flow out to die trial (1) with the second end (22) that described first end (21) has a narrow outlet along described funnel (2), the inclined-plane (23) making the downward smooth outflow of described self-compacting concrete is formed between described first end (21) and described the second end (22), the inner surface of described funnel (2) is smooth surface, is alignd with the center of die trial (1) in the center of the second end (22) of described funnel (2), described the second end (22) and described die trial (1) upper limb (11) interval one setpoint distance,
4) described self-compacting concrete fills up described die trial (1) and entirety exceeds the upper limb (11) of described die trial (1), strike off the described self-compacting concrete exceeding described die trial (1) upper limb (11), when described self-compacting concrete in described die trial (1) closes on initial set, with the floating upper surface of spatula.
2. the preparation method of self-compacting concrete test specimen according to claim 1, it is characterized in that, described self-compacting concrete in described step 1), comprise following component by weight: cement 340kg, flyash 140kg, medium sand 855kg, 5 ~ 20mm continuous grading rubble 840kg, water 170kg, additive 4.8kg.
3. the preparation method of self-compacting concrete test specimen according to claim 2, it is characterized in that, described funnel (2) in described step 3) forms by rounding tapering (24) and with the cylindrical portion (25) of the connection of described rounding tapering (24), described first end (21) is arranged on the suitable for reading of described rounding tapering (24), described the second end (22) is arranged on the end opening of described cylindrical portion (25), described first end (21) diameter is 300mm, described the second end (22) diameter is 80mm, the height of described rounding tapering (24) is 300mm, the height of described cylindrical portion (25) is 80mm.
4. the preparation method of self-compacting concrete test specimen according to claim 3, it is characterized in that, described step 2) in described die trial (1) the cube die trial (1) that is the 150mm length of side, be 10 seconds ~ 15 seconds by described self-compacting concrete from the described container time controling poured into described funnel (2) in described step 3).
5. the preparation method of self-compacting concrete test specimen according to claim 3, it is characterized in that, described step 2) in described die trial (1) be diameter 160mm, the cylindrical die trial (1) of height 320mm, be 20 seconds ~ 30 seconds by described self-compacting concrete from the described container time controling poured into described funnel (2) in described step 3).
6. the producing device of a self-compacting concrete test specimen, comprise die trial (1) and container, it is characterized in that, also comprise funnel (2) and the support (3) for funnel described in support (2), described funnel (2) has the first end (21) of a broad import and the second end (22) of a narrow outlet, the inner surface of described funnel (2) is smooth surface, the inclined-plane (23) for making the downward smooth outflow of described self-compacting concrete is provided with between described first end (21) and described the second end (22), align with the center of described die trial (1) and described the second end (22) and described die trial (1) upper limb (11) interval one setpoint distance in the center of described the second end (22), the volume of described container is greater than the volume of described die trial (1).
7. the producing device of self-compacting concrete test specimen according to claim 6, it is characterized in that, described funnel (2) forms by rounding tapering (24) and with the cylindrical portion (25) of the connection of described rounding tapering (24), described first end (21) is arranged on the suitable for reading of described rounding tapering (24), and described the second end (22) is arranged on the end opening of described cylindrical portion (25).
8. the producing device of self-compacting concrete test specimen according to claim 7, it is characterized in that, described first end (21) diameter is 300mm, described the second end (22) diameter is 80mm, the height of described rounding tapering (24) is 300mm, and the height of described cylindrical portion (25) is 80mm.
9. the producing device of self-compacting concrete test specimen according to claim 6, is characterized in that, described setpoint distance is 100mm ~ 200mm.
10. the producing device of self-compacting concrete test specimen according to claim 6, is characterized in that, described support (3) is provided with moveable base (31).
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| CN (1) | CN104441203B (en) |
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| CN106272950A (en) * | 2015-05-11 | 2017-01-04 | 任丘市永基建筑安装工程有限公司 | Combination concrete shuttering bubble treatment technology |
| CN111347544A (en) * | 2020-04-26 | 2020-06-30 | 重庆佳耀商品混凝土有限公司 | Part making machine and rapid forming method of concrete sample |
| CN112611855A (en) * | 2020-11-16 | 2021-04-06 | 清华大学 | Self-compacting concrete working performance testing device and testing method |
| US20210123500A1 (en) * | 2019-10-29 | 2021-04-29 | Ssw Advanced Technologies, Llc | Counterweight assembly and method of manufacturing the same |
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| CN102515636A (en) * | 2011-11-23 | 2012-06-27 | 广州大学 | Penetrated cement concrete material and preparation method and use thereof |
| CN202575951U (en) * | 2012-04-20 | 2012-12-05 | 黑龙江建筑职业技术学院 | Special funnel for preparing bituminous concrete Marshall testing block |
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| CN106272950A (en) * | 2015-05-11 | 2017-01-04 | 任丘市永基建筑安装工程有限公司 | Combination concrete shuttering bubble treatment technology |
| US20210123500A1 (en) * | 2019-10-29 | 2021-04-29 | Ssw Advanced Technologies, Llc | Counterweight assembly and method of manufacturing the same |
| US11932981B2 (en) * | 2019-10-29 | 2024-03-19 | Ssw Advanced Technologies, Llc | Counterweight assembly and method of manufacturing the same |
| CN111347544A (en) * | 2020-04-26 | 2020-06-30 | 重庆佳耀商品混凝土有限公司 | Part making machine and rapid forming method of concrete sample |
| CN112611855A (en) * | 2020-11-16 | 2021-04-06 | 清华大学 | Self-compacting concrete working performance testing device and testing method |
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| CN104441203B (en) | 2018-04-03 |
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