CN109467370A - A kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof - Google Patents

A kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof Download PDF

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Publication number
CN109467370A
CN109467370A CN201910029840.3A CN201910029840A CN109467370A CN 109467370 A CN109467370 A CN 109467370A CN 201910029840 A CN201910029840 A CN 201910029840A CN 109467370 A CN109467370 A CN 109467370A
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China
Prior art keywords
ceramic tile
aggregate
c160uhpc
concrete
additive mixing
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CN201910029840.3A
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Chinese (zh)
Inventor
罗百福
廖世琦
罗意
李丽
刘洋
冯勤勤
李�诚
唐勇明
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Xiangtan University
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Xiangtan University
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Priority to CN201910029840.3A priority Critical patent/CN109467370A/en
Publication of CN109467370A publication Critical patent/CN109467370A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017Aspects relating to the protection of the environment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses a kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof, and UHPC composition and ratio include: cement 757.5kg/m3;Silicon ash 151.4kg/m3;Flyash 37.9kg/m3;Tile powder 151.0kg/m3;High efficiency water reducing agent 46.4kg/m3;Ceramic tile aggregate 212.2kg/m3;Quartz sand 848.6kg/m3;Water 189.3kg/m3;Steel fibre 156kg/m3;The invention also discloses the preparation method of the UHPC, maintenance methods are as follows: wraps up closely concrete test block with wet cotton, and high frequency intermittent sprinkling maintenance, or is placed in water maintenance.Conservation system is not only simplified, the evaporation of moisture in concrete is also effectively prevent.The present invention has following technical advantage: recycling to discarded ceramic tile, reduces natural material consumption, reach energy-saving and environment-friendly effect;Tile powder has pozzolanic activity, improves concrete strength, durability, anti-cracking performance and flexural strength;Different-grain diameter tile powder is mixed, the gap accumulated between quartz sand has been filled up, so that structure is even closer;It is preferred that glue when high efficiency water reducing agent, so that UHPC of the present invention has the advantages that self-compaction.

Description

A kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof
Technical field
The present invention relates to the preparation technical field of civil engineering material, in particular to a kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof.
Background technique
With the fast development of modern society, the Super Engineerings such as a large amount of super high-rise buildings, Loads of Long-span Bridges and harbour airport It is more and more, dominate the concrete of material as building structure in order to comply with the Super Engineering that these emerge like the mushrooms after rain, Its high-intensitive, high-durability and high tenacity require be continuously improved, and a kind of novel cement-base composite material, i.e. very-high performance are mixed Solidifying soil (Ultra-High Performance Concrete, abbreviation UHPC) is come into being.
For the preparation method of traditional UHPC mainly there are two important means, one is to reduce water-binder ratio, passes through reduction The content of water in concrete reduces moisture evaporation to improve intensity;The other is by concrete be placed under special curing environment into Row maintenance, such as conserved under steam or high-temperature and high-pressure conditions, improve cementitious material and water the extent of reaction, accelerate react into Journey.This makes UHPC have superiority outstanding, and keeps its very widely used, such as petroleum, nuclear power and military installations.
However, the low water binder ratio of UHPC increases its viscosity, mobility is very poor, can not form gravity flow level state, causes existing Field construction is very difficult, it is made to be typically only used for prefabricated component.Moreover, UHPC curing condition is very harsh, maintenance cost Valuableness not only brings significant burden to the cost of Practical Project, also seriously constrains application of the UHPC on big component.
With the development of construction industry, the waste ceramic ceramic tile generated in construction industry be also it is quite surprising, such as by ceramic porcelain Carry out processing recycling after brick waste gathering, produce green building material concrete, can not only save natural resources, change give up into Treasured can also mitigate environmental pollution, improve the ecological environment, and promote the sustainable development of ceramic tile industry and social economy, and And China is a ceramic big country, it is estimated that, waste ceramic ceramic tile accounts for the 30% of daily ceramic tile volume, but its treatment measures is exhausted It is most of to use abandoned piles or bury method, it is both not environmentally or uneconomical.
Discarded ceramic tile is made into concrete supplementary cementitious material after comminuted powder is handled, study its economically, ecology Upper, technical feasibility is of great significance, first will be with important ecological environment benefit: recycling obsolete material is reduced Stack land occupation;Part replaces or all replaces concrete material, reduces the consumption of natural material, reduces carbon emission.In addition, passing through The disposition expense of discarded ceramic tile can be saved in Ji, reduces Cost of Concrete, can technically improve the working performance of concrete and strong Degree etc..
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology, provides a kind of high additive mixing ceramic tile aggregate C160UHPC And preparation method thereof.
A kind of high additive mixing ceramic tile aggregate C160UHPC, comprising: cement, silicon ash, flyash, high efficiency water reducing agent, quartz Sand, water, steel fibre, tile powder, ceramic tile aggregate.
Wherein, the composition and ratio of the concrete are as follows: cement 757.5kg/m3;Silicon ash 151.4kg/m3;Flyash 37.9kg/m3;Tile powder 151.0kg/m3;High efficiency water reducing agent 46.4kg/m3;Ceramic tile aggregate 212.2kg/m3;Quartz sand 848.6kg/m3;Water 189.3kg/m3;Steel fibre 156kg/m3
A kind of high additive mixing ceramic tile aggregate C160UHPC, cement are ordinary portland cement P.O 42.5, are changed It studies and is divided into silica (SiO2) 21.4%, aluminium oxide (Al2O3) 5.45%, iron oxide (Fe2O3) 3.50%, calcium oxide (CaO) 64.48%, magnesia (MgO) 1.46%, loss on ignition 2.51%;
The silicon ash is canescence, silica (SiO2) content 96%, specific surface area 23000m2/ kg, specific gravity 2400kg/m3, Grain granularity is 0.05 μm;
Flyash calcium oxide (CaO) content 5.13%, grain graininess are 8 μm;
The water-cement ratio of high additive mixing ceramic tile aggregate C160UHPC a kind of is 0.18-0.20.
The high efficiency water reducing agent is polycarboxylic acid series high efficiency water reducing agent.
Quartz sand silica (the SiO2) content is greater than 99.7%, grain graininess 0.85mm.
The steel fibre is flat type copper facing steel fibre, average length 13mm, average diameter 0.22mm.
The tile powder and ceramic tile aggregate are that discarded ceramic tile passes through grinding and is made after sieving, in which: ceramic tile powder Diameter is 1000 mesh, and ceramic tile aggregate size is 20-40 mesh.
A kind of high additive mixing ceramic tile aggregate C160UHPC, 7 days compression strength of concrete are 102.4Mpa, 28 Its compression strength is 163.7Mpa, and 28 days flexural strengths are 18.6MPa, and tensile strength is 8.4MPa within 28 days, and divergence is 194mm;
A kind of preparation method of high additive mixing ceramic tile aggregate C160UHPC, comprising the following steps:
Step 1: specific quantity tile powder, ceramic tile aggregate and quartz sand being weighed according to proportion, and stir at low speed 5min or more;
Step 2: specific quantity being added according to proportion and takes cement, silicon ash and flyash, and stirs at low speed 5min or more;
Step 3: specified amount of water and high efficiency water reducing agent are weighed according to proportion, and first the two is added after mixing, it is low after addition Speed stirring 2min, then high-speed stirred 5min,
Step 4: after the completion of step 3, specific quantity steel fibre being weighed according to proportion, and be slowly added to, after the completion of addition, continued high Speed stirring 10min;
Step 5: after the completion of step 4, the slurry mixed being poured slowly into mold, in the fog room under the conditions of being placed in 20 DEG C Maintenance 2 days;
Step 6: after the completion of step 5, demoulding maintenance being carried out to concrete, arrives high additive mixing ceramic tile after the completion of maintenance Aggregate C160UHPC.
A kind of preparation method of the high additive mixing ceramic tile aggregate C160UHPC, in step 6, the maintenance of concrete Mode can are as follows: 1) is placed in concrete in 20 DEG C of fog room, with wet cotton tight, carries out high-frequency interruption watering processing And keep wet cotton wet;2) concrete is placed in 20 DEG C of water and is conserved.
Beneficial effects of the present invention are as follows:
One, by the silica flour in tile powder all replacement ultra-high performance concrete, ceramic tile aggregate fraction substitutes thick in concrete Aggregate quartz sand instead of silica flour and reduces the dosage of quartz sand, reduce in the environment natural resources exploitation and It utilizes, achieves energy-saving and emission reduction purposes, and the recycling to discarded ceramic tile, reduce waste and stack land occupation, reduce natural The consumption of material reduces carbon emission;In addition, can economically save the disposition expense of discarded ceramic tile, reduce Cost of Concrete;In skill Working performance and the intensity etc. of concrete can be improved in art.
Two, useless ceramic tile is by crushing grinding and sieving ceramic tile aggregate obtained from heavy and light, and concrete obtained is compared to general Weight concrete made from logical river sand or quartz sand aggregate mitigates, and ceramic tile aggregate is coarse, surface is big containing micro mist, water absorption rate, It is able to suppress cement shrinkage, reduces the early-age shrinkage of concrete, and can be improved the fracture resistance of concrete;In addition, useless porcelain Brick can reduce the setting time of concrete with certain pozzolanic activity by crushing fine grinding screening tile powder obtained, Concrete strength and durability, and the tile powder that the present invention uses are improved, partial size is 1000 mesh, is preferable particle size, occurs Pozzolanic reaction it is more abundant compared with the tile powder of coarse grain diameter, and tile powder also improves the anti-cracking performance of concrete and anti- Roll over intensity.
Three, it is theoretical that the present invention is based on maximum bulk densities, is mixed with the ceramic tile aggregate of 20-40 mesh and the ceramic tile of 1000 mesh Powder has filled up the gap accumulated between quartz sand, so that structure is even closer, optimizes the accumulation of ultra-high performance concrete particle Density makes to have obtained abundant accumulation between its each component, ensure that the superhigh intensity of ultra-high performance concrete;The present invention also mixes Flyash, not only has pozzolanic, can replace part of cement, reduce the production cost of ultra-high performance concrete, It is economic and environment-friendly, and flyash microscopic particles surface is smooth, substantially increases the mobility of concrete, in addition the glue of optimization Than the excellent results for making it be entirely capable of reaching self-compaction.
Four, ultra-high performance concrete prepared by the present invention, since when high efficiency water reducing agent acts on preferred glue, stirring system The slurry obtained has certain mobility, cannot be only used for the pumping of concrete, and without vibrating in casting process, concrete Will be naturally closely knit, gas excludes naturally in slurry, is a kind of concrete for having excellent self-compaction property;And prepared by the present invention Ultra-high performance concrete do not need steam or High Temperature Curing, but concrete test block wrapped up with wet cotton close, and carried out High frequency intermittent sprinkling maintenance, or it is placed in water maintenance, this maintenance method not only simplifies conservation system, greatly reduces feeding Cost is protected, also effectively prevents the evaporation of moisture in concrete, and provide good moisturizing environment during concrete curing, The simplicity of its maintenance method is excellent with maintenance effect, so that ultra-high performance concrete is on the non-prefabricated components of Practical Project Large-scale use has huge application prospect.
Specific embodiment
With reference to embodiments, the present invention is further described in detail, but not limited to this.
A kind of high additive mixing ceramic tile aggregate C160UHPC, comprising: cement, silicon ash, flyash, high efficiency water reducing agent, quartz Sand, water, steel fibre, tile powder, ceramic tile aggregate.
Wherein, the composition and ratio of the concrete are as follows: cement 757.5kg/m3;Silicon ash 151.4kg/m3;Flyash 37.9kg/m3;Tile powder 151.0kg/m3;High efficiency water reducing agent 46.4kg/m3;Ceramic tile aggregate 212.2kg/m3;Quartz sand 848.6kg/m3;Water 189.3kg/m3;Steel fibre 156kg/m3
A kind of high additive mixing ceramic tile aggregate C160UHPC, the cement are ordinary portland cement P.O 42.5, Its chemical component is silica (SiO2) 21.4%, aluminium oxide (Al2O3) 5.45%, iron oxide (Fe2O3) 3.50%, calcium oxide (CaO) 64.48%, magnesia (MgO) 1.46%, loss on ignition 2.51%.
The silicon ash is canescence, silica (SiO2) content 96%, specific surface area 23000m2/ kg, specific gravity 2400kg/ m3, grain graininess is 0.05 μm.
Flyash calcium oxide (CaO) content 5.13%, grain graininess are 8 μm.
The water-cement ratio of high additive mixing ceramic tile aggregate C160UHPC a kind of is 0.18-0.20.
The high efficiency water reducing agent is polycarboxylic acid series high efficiency water reducing agent.
Quartz sand silica (the SiO2) content is greater than 99.7%, grain graininess 0.85mm.
The steel fibre is flat type copper facing steel fibre, average length 13mm, average diameter 0.22mm.
The tile powder and ceramic tile aggregate are that discarded ceramic tile passes through grinding and is made after sieving, in which: ceramic tile powder Diameter is 1000 mesh, and ceramic tile aggregate size is 20-40 mesh.
A kind of high additive mixing ceramic tile aggregate C160UHPC, 7 days compression strength of concrete are 102.4Mpa, 28 Its compression strength is 163.7Mpa, and 28 days flexural strengths are 18.6MPa, and tensile strength is 8.4MPa within 28 days, and divergence is 194mm;
A kind of preparation method of high additive mixing ceramic tile aggregate C160UHPC, comprising the following steps:
Step 1: specific quantity tile powder, ceramic tile aggregate and quartz sand being weighed according to proportion, and stir at low speed 5min or more;
Step 2: specific quantity being added according to proportion and takes cement, silicon ash and flyash, and stirs at low speed 5min or more;
Step 3: specified amount of water and high efficiency water reducing agent are weighed according to proportion, and first the two is added after mixing, it is low after addition Speed stirring 2min, then high-speed stirred 5min,
Step 4: after the completion of step 3, specific quantity steel fibre being weighed according to proportion, and be slowly added to, after the completion of addition, continued high Speed stirring 10min;
Step 5: after the completion of step 4, the slurry mixed being poured slowly into mold, in the fog room under the conditions of being placed in 20 DEG C Maintenance 2 days;
Step 6: after the completion of step 5, demoulding maintenance being carried out to concrete, arrives high additive mixing ceramic tile after the completion of maintenance Aggregate C160UHPC.
A kind of preparation method of the high additive mixing ceramic tile aggregate C160UHPC, in step 6, the maintenance of concrete Mode can are as follows: 1) is placed in concrete in 20 DEG C of fog room, with wet cotton tight, carries out high-frequency interruption watering processing And keep wet cotton wet;2) concrete is placed in 20 DEG C of water and is conserved.

Claims (8)

1. a kind of high additive mixing ceramic tile aggregate C160UHPC, it is characterised in that: include: cement, silicon ash, flyash, efficiently subtract Aqua, quartz sand, water, steel fibre, tile powder, ceramic tile aggregate;
Wherein, the composition and ratio of the concrete are as follows: cement 757.5kg/m3;Silicon ash 151.4kg/m3;Flyash 37.9kg/ m3;Tile powder 151.0kg/m3;High efficiency water reducing agent 46.4kg/m3;Ceramic tile aggregate 212.2kg/m3;Quartz sand 848.6kg/m3;Water 189.3kg/m3;Steel fibre 156kg/m3
2. a kind of high additive mixing ceramic tile aggregate C160UHPC according to claim 1, it is characterised in that: the cement is Ordinary portland cement P.O42.5, chemical component are silica (SiO2) 21.4%, aluminium oxide (Al2O3) 5.45%, iron oxide (Fe2O3) 3.50%, calcium oxide (CaO) 64.48%, magnesia (MgO) 1.46%, loss on ignition 2.51%;
The silicon ash is canescence, silica (SiO2) content 96%, specific surface area 23000m2/ kg, specific gravity 2400kg/m3, Grain granularity is 0.05 μm;
Flyash calcium oxide (CaO) content 5.13%, grain graininess are 8 μm;
The water-cement ratio of high additive mixing ceramic tile aggregate C160UHPC a kind of is 0.18-0.20.
3. a kind of high additive mixing ceramic tile aggregate C160UHPC according to claim 1, it is characterised in that: described efficiently to subtract Aqua is polycarboxylic acid series high efficiency water reducing agent.
4. a kind of high additive mixing ceramic tile aggregate C160UHPC according to claim 1, it is characterised in that: the quartz sand Silica (SiO2) content is greater than 99.7%, grain graininess 0.85mm.
5. a kind of high additive mixing ceramic tile aggregate C160UHPC according to claim 1, it is characterised in that: the steel fibre For flat type copper facing steel fibre, average length 13mm, average diameter 0.22mm.
6. a kind of high additive mixing ceramic tile aggregate C160UHPC according to claim 1, it is characterised in that: the tile powder It is discarded ceramic tile by being made after crushing and grinding and screening with ceramic tile aggregate, in which: tile powder partial size is 1000 mesh, porcelain Brick aggregate size is 20-40 mesh.
7. a kind of high additive mixing ceramic tile aggregate C160UHPC according to claim 1, it is characterised in that: the concrete 7 days compression strength be 102.4Mpa, 28 days compression strength is 163.7Mpa, and 28 days flexural strengths are 18.6MPa, 28 days tensions Intensity is 8.4MPa, divergence 194mm;
A kind of preparation method of high additive mixing ceramic tile aggregate C160UHPC, it is characterised in that: the following steps are included:
Step 1: specific quantity tile powder, ceramic tile aggregate and quartz sand being weighed according to proportion, and stir at low speed 5min or more;
Step 2: specific quantity being added according to proportion and takes cement, silicon ash and flyash, and stirs at low speed 5min or more;
Step 3: specified amount of water and high efficiency water reducing agent are weighed according to proportion, and first the two is added after mixing, it is low after addition Speed stirring 2min, then high-speed stirred 5min,
Step 4: after the completion of step 3, specific quantity steel fibre being weighed according to proportion, and be slowly added to, after the completion of addition, continued high Speed stirring 10min;
Step 5: after the completion of step 4, the slurry mixed being poured slowly into mold, in the fog room under the conditions of being placed in 20 DEG C Maintenance 2 days;
Step 6: after the completion of step 5, demoulding maintenance being carried out to concrete, arrives high additive mixing ceramic tile after the completion of maintenance Aggregate C160UHPC.
8. the preparation method of high additive mixing ceramic tile aggregate C160UHPC according to claim 8 a kind of, it is characterised in that: In step 6, the maintenance method of concrete can are as follows: 1) concrete is placed in 20 DEG C of fog room, with wet cotton tight, High-frequency interruption watering is carried out to handle and keep wet cotton wet;2) concrete is placed in 20 DEG C of water and is conserved.
CN201910029840.3A 2019-01-14 2019-01-14 A kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof Pending CN109467370A (en)

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Application publication date: 20190315