CN104961365A - Crushed stone aggregate and preparation method thereof - Google Patents
Crushed stone aggregate and preparation method thereof Download PDFInfo
- Publication number
- CN104961365A CN104961365A CN201510314397.6A CN201510314397A CN104961365A CN 104961365 A CN104961365 A CN 104961365A CN 201510314397 A CN201510314397 A CN 201510314397A CN 104961365 A CN104961365 A CN 104961365A
- Authority
- CN
- China
- Prior art keywords
- crushed stone
- stone aggregate
- concrete
- interface agent
- kernel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention belongs to the technical field of engineering material construction technologies, and discloses a crushed stone aggregate. The crushed stone aggregate is a surface modified crushed stone aggregate, and the surface modified crushed stone aggregate comprises a crushed stone aggregate core and a concrete interface agent wrapped on the external surface of the crushed stone aggregate core. The invention also discloses a preparation method of the crushed stone aggregate. The crushed stone aggregate prepared through the method can greatly reduce the discreteness of the strength of a concrete material and improve the strength of concrete by above 10% under reasonable performances and immersion concentration of the concrete interface agent material. The method has important engineering application values in the improvement of the construction quality of the concrete.
Description
Technical field
The invention belongs to engineering materials construction technology technical field, relate to a kind of crushed stone aggregate and preparation method thereof, be mainly used in requiring comparatively strict structure to concrete strength quality during engineering is produced.
Background technology
In existing industry, covil construction and bridge structure, skeleton construction occupies very large proportion.The requirement of development to concrete strength quality of modern project structure is more and more higher.
In Practical Project, whether structure can destroy the intensity/minimum position of interior force rate depending on structure or component, when internal force is identical, is then controlled by the minimum position of intensity.Using concrete strength standard value as basic typical value in current specifications, 95% fraction is got in suggestion, then concrete strength Calculating Method of The Standard Values is:
in formula, f
ckfor concrete crushing strength standard value,
for ultimate compression strength mean value, σ is the standard deviation representing discreteness.For improving concrete performance, research institution and engineering construction unit often adopt the method improving concrete strength mean value.
From calculation formula, reducing concrete discreteness and can reduce standard deviation, is another effective measure improving Standard strength of concrete.
The conventional measure reducing concrete discreteness has: control raw material quality, control proportioning, control construction quality, control water cement ratio etc.Because concrete destruction starts from the interface microfracture between coarse aggregate and Behavior of Hardened Cement Paste, and the most frequently used coarse aggregate---rubble stone surface feature varies, concavo-convex turnover is variable, and therefore the discreteness of concrete performance is still far away higher than material of construction such as reinforcing bars.But, so far, control crushed stone aggregate surface characteristic discreteness and still lack effective technique means.
Summary of the invention
During current Practical Project is built, normal employing controls raw material quality, controls mix-design quality, controls construction quality, controls the methods such as water cement ratio to reduce concrete discreteness, during actual production to material and procedure calls higher., compare with other materials, concrete performance has high dispersion meanwhile, has obvious disadvantageous effect to the performance of concrete member or structure.
The present invention by the following technical programs, proposes the new approaches and production technique that reduce concrete discreteness.
The present invention adopts following technical scheme:
Described crushed stone aggregate is surface modification crushed stone aggregate, described surface modification crushed stone aggregate comprise crushed stone aggregate kernel, and the concrete interface oxidant layer of wrapping up on crushed stone aggregate kernel outside surface.
Comprise the preparation method of the crushed stone aggregate of such scheme,
Step 1: crushed stone aggregate kernel to be immersed in concrete interface agent 5 ~ 15 minutes, and to stir 3 ~ 5 times, forms the surface modification crushed stone aggregate that concrete interface agent is evenly attached to crushed stone aggregate core surface;
Step 2: above-mentioned surface modification crushed stone aggregate airing 1 hour, when the solidifying Soil Interface oxidant layer of crushed stone aggregate core surface is saturated dry surface, then carries out processing with sand-cement slurry and stirs, obtain last modification crushed stone aggregate concrete.
The particle fineness of further described concrete interface agent is at 0.06-0.07mm, and 0.08 square hole sieve tails over not higher than 1.0%, and specific surface area is not less than 350 ㎡/kg, and when adopting silicate cement only to starch, label is not less than 52.5.
Water cement ratio in further described concrete interface agent is between 0.5-1.
Cement content further in described concrete interface agent is not less than 20%.
Effect of the present invention and benefit are: the present invention, from the failure mechanisms of concrete material, proposes a kind of new approaches and the producing and manufacturing technique that reduce concrete discreteness, significantly reduces the discreteness of concrete strength.The method that construction technology of the present invention reduces concrete strength discreteness mutually is than ever comparatively simple efficient, when concrete interface agent and water cement ratio are selected reasonable, under lower cost condition, can realize the raising of concrete performance, have certain economic worth.The present invention is simultaneously that the improvement of concrete performance provides new approach, can be widely used in the construction of skeleton construction, has important theory value and engineer applied value.
Accompanying drawing explanation
Fig. 1 is the crushed stone aggregate schematic diagram of external parcel concrete interface agent;
Fig. 2 is the concrete schematic diagram of modification crushed stone aggregate;
Have in figure: 1, crushed stone aggregate kernel; 2, concrete interface oxidant layer; 3, sand-cement slurry.
Embodiment
Embodiment 1
A kind of crushed stone aggregate, described crushed stone aggregate is surface modification crushed stone aggregate, and described surface modification crushed stone aggregate comprises crushed stone aggregate kernel 1, and the concrete interface oxidant layer 2 of wrapping up on crushed stone aggregate kernel 1 outside surface.
Embodiment 2
A kind of preparation method comprising the crushed stone aggregate of such scheme:
Step 1: crushed stone aggregate kernel 1 to be immersed in concrete interface agent 5 ~ 15 minutes, and to stir 3 ~ 5 times, forms the surface modification crushed stone aggregate that concrete interface agent is evenly attached to crushed stone aggregate kernel 1 surface;
Step 2: above-mentioned surface modification crushed stone aggregate airing 1 hour, when the solidifying Soil Interface oxidant layer 2 on crushed stone aggregate kernel 1 surface is in saturated dry surface, then carries out processing with sand-cement slurry 3 and stirs, obtain last modification crushed stone aggregate concrete.
The particle fineness of described concrete interface agent is at 0.06-0.07mm, and 0.08 square hole sieve tails over not higher than 1.0%, and specific surface area is not less than 350 ㎡/kg, and when adopting silicate cement only to starch, label is not less than 52.5.Water cement ratio in described concrete interface agent is between 0.5-1.Cement content in described concrete interface agent is not less than 20%.
Below the present invention is made and illustrating in more detail:
1, from change concrete loading process mechanism, the new approaches improving concrete performance by reducing concrete discreteness are proposed.Concrete destruction starts from the interface microfracture between crushed stone aggregate kernel 1 and cement sand bed 3.The present invention is less by clogging particle in crushed stone aggregate kernel 1 and the interface of cement sand bed 3, the concrete interface oxidant layer 2 that bonding strength is higher.Owing to have employed concrete interface agent, ensure that concrete interface agent and crushed stone aggregate kernel 1 cohesive strength are higher than the cohesive strength between crushed stone aggregate kernel and Portland cement.Simultaneously again due to the mutual infiltration Penetration Signature of the height of composition between concrete interface agent and sand-cement slurry 3, and concrete interface agent particle fineness is less, homogeneity is better relative to cement granules, thus reduces the otherness of interface cracking, reduce concrete discreteness, improve concrete strength.
2, the present invention's novel process of being soaked in concrete interface agent by crushed stone aggregate, the discreteness of natural rubble surface characteristic is greatly reduced, and this makes concrete discreteness significantly reduce.
3, the cost of concrete interface agent is general higher, only adopts the method infiltrating and be attached to crushed stone aggregate kernel 1, and the consumption of interfacial agents is far smaller than and directly changes concrete matched ratio method, and therefore, the relatively conventional method improving intensity saves cost.And ordinary method does not have help for improving concrete discreteness.
4, the present invention is on experimental study basis, determines to think, concrete interface agent can adopt the conventional interfacial agents on market, or high-strength cement, but its strength mark should at least high than a former cement label.
5, the present invention is by limiting the particle fineness (particle fineness is at 0.06-0.07mm) of interfacial agents, the specific surface area (specific surface area is not less than 350 ㎡/kg) of particle, the more excellent concentration of slurries (controls water cement ratio about 1, be not less than 0.5) and soak time 5 ~ 15min, and coordinate stirring 3 ~ 5 times, to ensure that interfacial agents is at the good adhesion effect of aggregate surface.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a crushed stone aggregate, it is characterized in that: described crushed stone aggregate is surface modification crushed stone aggregate, described surface modification crushed stone aggregate comprises crushed stone aggregate kernel (1), and the concrete interface oxidant layer (2) of wrapping up on crushed stone aggregate kernel (1) outside surface.
2. a preparation method for crushed stone aggregate according to claim 1, is characterized in that:
Step 1: crushed stone aggregate kernel (1) to be immersed in concrete interface agent 5 ~ 15 minutes, and to stir 3 ~ 5 times, forms the surface modification crushed stone aggregate that concrete interface agent is evenly attached to crushed stone aggregate kernel (1) surface;
Step 2: above-mentioned surface modification crushed stone aggregate airing 1 hour, when the solidifying Soil Interface oxidant layer (2) on crushed stone aggregate kernel (1) surface is in saturated dry surface, carry out processing with sand-cement slurry (3) again to stir, obtain last modification crushed stone aggregate concrete.
3. crushed stone aggregate preparation method according to claim 2, it is characterized in that: the particle fineness of described concrete interface agent is at 0.06-0.07mm, and 0.08 square hole sieve tails over not higher than 1.0%, and specific surface area is not less than 350 ㎡/kg, when adopting silicate cement only to starch, label is not less than 52.5.
4. crushed stone aggregate preparation method according to claim 2, is characterized in that: the water cement ratio in described concrete interface agent is between 0.5-1.
5. crushed stone aggregate preparation method according to claim 2, is characterized in that: the cement content in described concrete interface agent is not less than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510314397.6A CN104961365B (en) | 2015-06-09 | 2015-06-09 | A kind of crushed stone aggregate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510314397.6A CN104961365B (en) | 2015-06-09 | 2015-06-09 | A kind of crushed stone aggregate and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104961365A true CN104961365A (en) | 2015-10-07 |
| CN104961365B CN104961365B (en) | 2017-10-17 |
Family
ID=54215495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510314397.6A Active CN104961365B (en) | 2015-06-09 | 2015-06-09 | A kind of crushed stone aggregate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104961365B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439891A (en) * | 2018-05-11 | 2018-08-24 | 安徽砼宇特构科技有限公司 | A kind of modified high-efficient energy concrete and preparation method thereof |
| CN111977998A (en) * | 2020-08-27 | 2020-11-24 | 长安大学 | High-surface-roughness aggregate and preparation method thereof |
| CN113845351A (en) * | 2021-10-28 | 2021-12-28 | 上海靓固生态环境科技股份有限公司 | Colored permeable pavement material and preparation process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729182Y (en) * | 2004-07-19 | 2005-09-28 | 济南大学 | Cement concrete |
| CN1994709A (en) * | 2005-12-31 | 2007-07-11 | 浙江工业大学 | Preparation method of concrete mixed with addition and aggregate |
| CN101863631A (en) * | 2010-06-21 | 2010-10-20 | 东南大学 | Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof |
-
2015
- 2015-06-09 CN CN201510314397.6A patent/CN104961365B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729182Y (en) * | 2004-07-19 | 2005-09-28 | 济南大学 | Cement concrete |
| CN1994709A (en) * | 2005-12-31 | 2007-07-11 | 浙江工业大学 | Preparation method of concrete mixed with addition and aggregate |
| CN101863631A (en) * | 2010-06-21 | 2010-10-20 | 东南大学 | Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王子明等: ""聚合物乳液包裹粗集料混凝土性能的研究"", 《混凝土》 * |
| 马一平: ""提高水泥石-集料界面粘结强度的研究"", 《建筑材料学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439891A (en) * | 2018-05-11 | 2018-08-24 | 安徽砼宇特构科技有限公司 | A kind of modified high-efficient energy concrete and preparation method thereof |
| CN111977998A (en) * | 2020-08-27 | 2020-11-24 | 长安大学 | High-surface-roughness aggregate and preparation method thereof |
| CN113845351A (en) * | 2021-10-28 | 2021-12-28 | 上海靓固生态环境科技股份有限公司 | Colored permeable pavement material and preparation process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104961365B (en) | 2017-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107235684A (en) | A kind of recycled fine aggregate ultra-high performance concrete and its application method | |
| CN103936368B (en) | C40 level simple grain level regeneration self-compacting concrete and preparation method thereof | |
| CN109896788A (en) | Building connector grouting material prepared by wet-milling mode | |
| CN109503078A (en) | A kind of preparation method of clear-water concrete | |
| CN107721303A (en) | A kind of iron tailings is granulated water-permeable brick and preparation method thereof | |
| CN106587843A (en) | High-strength highly-permeable inorganic concrete and preparation method thereof | |
| CN105198347A (en) | Early strength and fast hardening type rock filling and grouting recycled concrete and production method thereof | |
| CN105693124A (en) | Preparation method and application method of fine reclaimed aggregate for concrete internal curing | |
| CN104961365A (en) | Crushed stone aggregate and preparation method thereof | |
| CN109437761A (en) | A kind of preparation method of energy conservation and environmental protection lightweight aggregate concrete | |
| CN109942255A (en) | A kind of regeneration concrete and preparation method thereof | |
| CN104386987B (en) | Composite grouting material of modified pitch emulsion and modified cement and preparation method thereof | |
| CN104016609B (en) | One kind prepares the addition of ferronickel slag environment-friendly type active mineral material and excites agent method | |
| CN108424047B (en) | Red mud-based rapid-setting grouting material suitable for grouting reinforcement and treatment of sandy soil stratum | |
| CN101177338A (en) | Highly-controllable strength and dimensionally-stable curing material | |
| CN109704674A (en) | A kind of whisker reinforcement dry slag pervious concrete | |
| CN104591646A (en) | Grouting material for surrounding rock | |
| CN102649633A (en) | Novel post-cast strip concrete | |
| CN108358566A (en) | A kind of ultra-high performance concrete and its manufacturing method | |
| CN107382215A (en) | A kind of preparation method of high dense concrete road | |
| CN109912246B (en) | Method for preparing early strength concrete by exciting coal-to-liquid furnace slag with N, N-dimethyl formamide | |
| CN107902998A (en) | A kind of lightweight foam soil prepared using alum clay tailing and preparation method thereof | |
| CN107021698A (en) | A kind of grinding coagulation soil and preparation method thereof | |
| CN110028273A (en) | A kind of grouting material and preparation method thereof reinforced for road | |
| CN107140907B (en) | A kind of concrete adulterating quartz artificial stone waste residue and flyash |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |