CN105776921A - High-quality aggregate for cement concrete and preparation method of high-quality aggregate - Google Patents
High-quality aggregate for cement concrete and preparation method of high-quality aggregate Download PDFInfo
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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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Abstract
The invention provides high-quality aggregate for cement concrete and a preparation method of the high-quality aggregate. The high-quality aggregate includes high-quality coarse aggregate and high-quality fine aggregate. The high-quality coarse aggregate is obtained by evenly mixing gravels, and the sieve residue mass percentages of the gravels of nominal diameters of 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm and 2.36mm are sequentially 2%, 30%, 10%, 30%, 25% and 3%. The high-quality fine aggregate is obtained by evenly mixing sand, and the sieve residue mass percentages of the sand of nominal diameters of 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm and 0.15mm are sequentially 2%, 5%, 8%, 30%, 30% and 25%. Preferably, ground stone powder which does not exceed 9% of the total mass of the high-quality fine aggregate is used to replace the 0.15-0.30mm sand whose mass is identical with that of the ground stone powder. When the high-quality aggregate is used for preparing the concrete, the fluidity of the concrete can be increased, the performances such as strength and durability of self-compacting concrete can be improved, and evident economic benefits can be achieved. Under same mixing strength grade, the working performance of the concrete prepared by the high-quality aggregate is improved as compared with that of the concrete prepared by common aggregate, and the use amount of cementitious materials of each cubic meter of concrete is lowered by 30-60kg.
Description
Technical field
The present invention relates to building engineering field, be specially a kind of cement concrete fine work aggregate and preparation method.
Background technology
In short supply recently as natural sand and stone resources, the sandstone that steady quality, function admirable, grain composition are good, clay content is little is fewer and feweri, and in the face of the reality of sand material resource shortage, the underproof stone of some grating also has to be applied to engineering.Also take to add cement in the past, improve the way of sand coarse aggregate ratio, but still the phenomenons such as bad, the isolation of mixture workability occur, directly affect concrete quality.But also the rising of the main material cost of commerical ready-mixed concrete can be caused, reduce the economic benefit of enterprise.
Fine work aggregate, is optimized in grain composition by general aggregate, adds up to tail over the sandstone that curve is specific curves.Utilize standard square hole sandstone sieve to sieve step by step with common sandstone cement concrete, according still further to certain proportion by each particles and stone powder mix homogeneously again, obtain fine work aggregate.Fine work aggregate is utilized to prepare concrete, every cubic meter of concrete reduces gel material content 30～50kg, ensure that concrete has good service behaviour and comprcssive strength simultaneously, solve current cement concrete particles of aggregates grating poor, cause that gel material content is high but workability is poor, the problem that intensity is low, reduces water reducer consumption, remarkable in economical benefits.
Additionally, it is huge that the waste mining rock of current iron ore mine stores up total amount, the harm storing up the waste to land resource and security context of mine tailing manifests gradually, if waste mining rock being processed into fine work aggregate, it is effectively utilized iron ore mine solid waste resource on the one hand, develops quality sand and stone aggregate for premixed concrete industry again on the other hand.
Summary of the invention
For solving prior art Problems existing, the present invention proposes a kind of cement concrete fine work aggregate and preparation method.By using fine work aggregate, improve concrete work performance, improve concrete crushing strength, there is distinct economic.
The technical scheme is that
Described a kind of cement concrete fine work aggregate, it is characterised in that: described fine work aggregate is divided into fine work coarse aggregate and fine work fine aggregate；Described fine work coarse aggregate is followed successively by 2% for dividing to tail over by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm, and the rubble mix homogeneously of 30%, 10%, 30%, 25%, 3% obtains；Described fine work fine aggregate is followed successively by 2% for dividing to tail over by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and the sand mix homogeneously of 5%, 8%, 30%, 30%, 25% obtains.
Above-mentioned cement concrete fine work aggregate processing method, it is characterised in that: comprise the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；By single graded sand of sieving step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm according to mass percent 2%, 5%, 8%, 30%, 30%, 25% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
Further preferred version, according to above-mentioned cement concrete fine work aggregate, it is characterised in that: in described fine work fine aggregate, adopt the sand less than the replacement of the levigate stone powder of fine work fine aggregate gross mass 9% with 0.15～0.30mm of levigate stone powder equal in quality.
Above-mentioned preferred cement concrete fine work aggregate processing method, it is characterised in that: comprise the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；The single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, it is not less than 16%, carries out proportioning Homogeneous phase mixing not higher than 9%, obtain fine work fine aggregate.
Beneficial effect
Fine work coarse aggregate stacking states in fine work aggregate of the present invention reaches tightly packed, loosely-packed voidage and tightly packed voidage respectively 39% and 33%, when stone voidage reduces, needed for fill concrete internal voids, slurry just reduces, when concrete has more rich slurry, concrete parcel property, water-retaining property, cohesiveness and mobility all can be improved, and after concrete hardening, defect reduces, concrete strength improves, and endurance quality also can improve.
Same, fine work fine aggregate stacking states in fine work aggregate of the present invention reaches tightly packed, and loosely-packed voidage and tightly packed voidage respectively 38% and 33%, when sand voidage reduces, needed for fill concrete internal voids, slurry reduces further, when concrete has more rich slurry, concrete parcel property, water-retaining property, cohesiveness and mobility all can be improved, after concrete hardening, defect reduces, and concrete strength improves, and endurance quality also can improve.
And when the sand adopting levigate stone powder to replace part 0.15～0.30mm, levigate stone powder can the internal microscale void of fill concrete, make concrete more closely knit.
Embodiments of the invention also indicate that, adopt fine work aggregate of the present invention to prepare concrete, can increase concrete fluidity, improve the performances such as self-compacting concrete intensity, durability, and have significant economic benefit.When Mined scale strength grade is identical, compared with concrete prepared by general aggregate, adopting fine work aggregate concrete workability prepared by the inventive method to improve, every side concrete reduces cement amount 30～60kg.
The additional aspect of the present invention and advantage will part provide in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention.
Detailed description of the invention
Being described below in detail embodiments of the invention, all embodiments are illustrative of, it is intended to be used for explaining the present invention, and be not considered as limiting the invention.
Example below is respectively adopted the fine work aggregate of general aggregate and present invention proposition and prepares 1m3Concrete, and the advantage of the comparative illustration present invention:
Embodiment 1:
General aggregate C30 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, the common coarse aggregate of 5～25mm continuous grading, and modulus of fineness is the natural sand of 2.3, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Fine work aggregate C30 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, fine work aggregate, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Described fine work aggregate processing method, comprises the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；By single graded sand of sieving step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm according to mass percent 2%, 5%, 8%, 30%, 30%, 25% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
Adopt above-mentioned raw materials to prepare fresh concrete respectively: sand to be added blender, adds cement, mineral admixture, be eventually adding coarse aggregate, stir 30s, be sufficiently mixed, add mixing water, high-efficiency water-reducing agent of poly-carboxylic acid, stir 90s, obtain fresh concrete.
Table 1 and table 2 show respectively proportioning and the performance detection of general aggregate C30 concrete (numbering 1) and fine work aggregate C30 concrete (numbering 2).Concrete slump about 225mm, slump flow test is close to 600mm, good fluidity, cohesiveness, good water-retaining property.
Table 1 mix Design
Table 2 fresh concrete and properties of hardened concrete
Embodiment 2:
General aggregate C35 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, the common coarse aggregate of 5～25mm continuous grading, and modulus of fineness is the natural sand of 2.3, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Fine work aggregate C35 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, fine work aggregate, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Described fine work aggregate processing method, comprises the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；By single graded sand of sieving step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm according to mass percent 2%, 5%, 8%, 30%, 30%, 25% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
Adopt above-mentioned raw materials to prepare fresh concrete respectively: sand to be added blender, adds cement, mineral admixture, be eventually adding coarse aggregate, stir 30s, be sufficiently mixed, add mixing water, high-efficiency water-reducing agent of poly-carboxylic acid, stir 90s, obtain fresh concrete.
Table 3 and table 4 show respectively proportioning and the performance detection of general aggregate C35 concrete (numbering 1) and fine work aggregate C35 concrete (numbering 2).Concrete slump about 230mm, slump flow test is more than 600mm, good fluidity, cohesiveness, good water-retaining property.
Table 3 mix Design
Table 4 fresh concrete and properties of hardened concrete
Embodiment 3:
General aggregate C40 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, the common coarse aggregate of 5～25mm continuous grading, and modulus of fineness is the natural sand of 2.3, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Fine work aggregate C40 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, fine work aggregate, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Described fine work aggregate processing method, comprises the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；By single graded sand of sieving step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm according to mass percent 2%, 5%, 8%, 30%, 30%, 25% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
Adopt above-mentioned raw materials to prepare fresh concrete respectively: sand to be added blender, adds cement, mineral admixture, be eventually adding coarse aggregate, stir 30s, be sufficiently mixed, add mixing water, high-efficiency water-reducing agent of poly-carboxylic acid, stir 90s, obtain fresh concrete.
Table 5 and table 6 show respectively proportioning and the performance detection of general aggregate C40 concrete (numbering 1) and fine work aggregate C40 concrete (numbering 2).Concrete slump about 230mm, slump flow test is more than 600mm, good fluidity, cohesiveness, good water-retaining property.
Table 5 mix Design
Table 6 fresh concrete and properties of hardened concrete
Embodiment 4:
General aggregate C30 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, the common coarse aggregate of 5～25mm continuous grading, and modulus of fineness is the natural sand of 2.3, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Fine work aggregate C30 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, fine work aggregate, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Described fine work aggregate processing method, comprises the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；The single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, it is not less than 16%, carries out proportioning Homogeneous phase mixing not higher than 9%, obtain fine work fine aggregate.The present embodiment is the single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, 20%, 5% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
Adopt above-mentioned raw materials to prepare fresh concrete respectively: sand to be added blender, adds cement, mineral admixture, be eventually adding coarse aggregate, stir 30s, be sufficiently mixed, add mixing water, high-efficiency water-reducing agent of poly-carboxylic acid, stir 90s, obtain fresh concrete.
Table 7 and table 8 show respectively proportioning and the performance detection of general aggregate C30 concrete (numbering 1) and fine work aggregate C30 concrete (numbering 2).Concrete slump about 230mm, slump flow test is more than 600mm, good fluidity, cohesiveness, good water-retaining property.
Table 7 mix Design
Table 8 fresh concrete and properties of hardened concrete
Embodiment 5:
General aggregate C35 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, the common coarse aggregate of 5～25mm continuous grading, and modulus of fineness is the natural sand of 2.3, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Fine work aggregate C35 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, fine work aggregate, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Described fine work aggregate processing method, comprises the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；The single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, it is not less than 16%, carries out proportioning Homogeneous phase mixing not higher than 9%, obtain fine work fine aggregate.The present embodiment is the single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, 20%, 5% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
Adopt above-mentioned raw materials to prepare fresh concrete respectively: sand to be added blender, adds cement, mineral admixture, be eventually adding coarse aggregate, stir 30s, be sufficiently mixed, add mixing water, high-efficiency water-reducing agent of poly-carboxylic acid, stir 90s, obtain fresh concrete.
Table 9 and table 10 show respectively proportioning and the performance detection of general aggregate C35 concrete (numbering 1) and fine work aggregate C35 concrete (numbering 2).Concrete slump about 230mm, slump flow test is more than 600mm, good fluidity, cohesiveness, good water-retaining property.
Table 9 mix Design
Table 10 fresh concrete and properties of hardened concrete
Embodiment 6:
General aggregate C40 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, the common coarse aggregate of 5～25mm continuous grading, and modulus of fineness is the natural sand of 2.3, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Fine work aggregate C40 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, fine work aggregate, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Described fine work aggregate processing method, comprises the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；The single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, it is not less than 16%, carries out proportioning Homogeneous phase mixing not higher than 9%, obtain fine work fine aggregate.The present embodiment is the single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, 20%, 5% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
Adopt above-mentioned raw materials to prepare fresh concrete respectively: sand to be added blender, adds cement, mineral admixture, be eventually adding coarse aggregate, stir 30s, be sufficiently mixed, add mixing water, high-efficiency water-reducing agent of poly-carboxylic acid, stir 90s, obtain fresh concrete.
Table 11 and table 12 show respectively proportioning and the performance detection of general aggregate C40 concrete (numbering 1) and fine work aggregate C40 concrete (numbering 2).Concrete slump about 230mm, slump flow test is more than 600mm, good fluidity, cohesiveness, good water-retaining property.
Table 11 mix Design
Table 12 fresh concrete and properties of hardened concrete
Embodiment 7:
General aggregate C30 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, the common coarse aggregate of 5～25mm continuous grading, and modulus of fineness is the natural sand of 2.3, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Fine work aggregate C30 concrete material is: 42.5 grades of Portland cements, II grade of flyash, S95 breeze, fine work aggregate, high-efficiency water-reducing agent of poly-carboxylic acid, tap water.
Described fine work aggregate processing method, comprises the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；The single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, it is not less than 16%, carries out proportioning Homogeneous phase mixing not higher than 9%, obtain fine work fine aggregate.The present embodiment is the single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, 20%, 9% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
Adopt above-mentioned raw materials to prepare fresh concrete respectively: sand to be added blender, adds cement, mineral admixture, be eventually adding coarse aggregate, stir 30s, be sufficiently mixed, add mixing water, high-efficiency water-reducing agent of poly-carboxylic acid, stir 90s, obtain fresh concrete.
Table 13 and table 14 show respectively proportioning and the performance detection of general aggregate C30 concrete (numbering 1) and fine work aggregate C30 concrete (numbering 2).Concrete slump about 230mm, slump flow test about 600mm, good fluidity, cohesiveness, good water-retaining property.
Table 13 mix Design
Table 14 fresh concrete and properties of hardened concrete
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, being not considered as limiting the invention, above-described embodiment can be changed when without departing from principles of the invention and objective, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (4)
1. a cement concrete fine work aggregate, it is characterised in that: described fine work aggregate is divided into fine work coarse aggregate and fine work fine aggregate；Described fine work coarse aggregate is followed successively by 2% for dividing to tail over by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm, and the rubble mix homogeneously of 30%, 10%, 30%, 25%, 3% obtains；Described fine work fine aggregate is followed successively by 2% for dividing to tail over by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and the sand mix homogeneously of 5%, 8%, 30%, 30%, 25% obtains.
2. the fine work aggregate processing method of cement concrete described in claim 1, it is characterised in that: comprise the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；By single graded sand of sieving step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm according to mass percent 2%, 5%, 8%, 30%, 30%, 25% carries out proportioning Homogeneous phase mixing, obtains fine work fine aggregate.
3. a kind of cement concrete fine work aggregate according to claim 1, it is characterised in that: in described fine work fine aggregate, adopt the sand replacing 0.15～0.30mm with levigate stone powder equal in quality less than the levigate stone powder of fine work fine aggregate gross mass 9%.
4. the fine work aggregate processing method of cement concrete described in claim 3, it is characterised in that: comprise the following steps:
Step 1: the reinforcement of concrete rubble is sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm；Sand for Concrete is sieved step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm；
Step 2: according to mass percent, the simple grain level stone sieved step by step by nominal diameter 26.5mm, 19.0mm, 16.0mm, 9.50mm, 4.75mm, 2.36mm is followed successively by 2%, and 30%, 10%, 30%, 25%, 3% carries out Homogeneous phase mixing, obtains fine work coarse aggregate；The single graded sand that will sieve step by step by nominal diameter 4.75mm, 2.36mm, 1.18mm, 0.60mm, 0.30mm, 0.15mm, and levigate stone powder is according to mass percent 2%, 5%, 8%, 30%, 30%, it is not less than 16%, carries out proportioning Homogeneous phase mixing not higher than 9%, obtain fine work fine aggregate.
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| CN (1) | CN105776921A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225083A (en) * | 2017-07-14 | 2017-10-03 | 福建南方路面机械有限公司 | A kind of detection method of aggregate grading and the device using this method |
| CN111847947A (en) * | 2020-07-30 | 2020-10-30 | 中建西部建设新疆有限公司 | Sandstone aggregate grading optimization method |
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2016
- 2016-03-21 CN CN201610160621.5A patent/CN105776921A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 张晓翘等主编: "《建筑材料》", 31 January 2014 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225083A (en) * | 2017-07-14 | 2017-10-03 | 福建南方路面机械有限公司 | A kind of detection method of aggregate grading and the device using this method |
| CN107225083B (en) * | 2017-07-14 | 2023-06-20 | 福建南方路面机械股份有限公司 | Sand grading detection method and device using same |
| CN111847947A (en) * | 2020-07-30 | 2020-10-30 | 中建西部建设新疆有限公司 | Sandstone aggregate grading optimization method |
| CN111847947B (en) * | 2020-07-30 | 2022-03-18 | 中建西部建设新疆有限公司 | Sandstone aggregate grading optimization method |
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Application publication date: 20160720 |