CN105330239A - Preparing method for heat-resisting modified concrete - Google Patents
Preparing method for heat-resisting modified concrete Download PDFInfo
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- CN105330239A CN105330239A CN201510928449.9A CN201510928449A CN105330239A CN 105330239 A CN105330239 A CN 105330239A CN 201510928449 A CN201510928449 A CN 201510928449A CN 105330239 A CN105330239 A CN 105330239A
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Abstract
The invention discloses a preparing method for heat-resisting modified concrete. The preparing method comprises the following steps of raw material preparing; coarse aggregate pretreating; mortar preparing; mixing of mortar and pretreated coarse aggregate; concrete prefabricating and pouring. The preparing method has the following advantages of being easy to operate and realize; the prepared heat-resisting modified concrete is low in dead weight and high in strength, and meets the requirement of the special building industry; the prepared heat-resisting modified concrete is high in tolerable temperature, low in price relatively, and capable of being used in the special fields of metallurgy, chemical industry, petroleum, building materials and the like on a large scale.
Description
Technical field
The present invention relates to building material technical field, particularly relate to a kind of heat resistance modified concrete preparation method.
Background technology
The Thermal Equipment of the special industries such as metallurgy, chemical industry, oil and building materials and the long-term structures by high temperature action are normally built by concrete material and are formed.This class formation palpus withstand high temperatures, and traditional concrete is primarily of compositions such as cement, river sand, stones, under the high temperature conditions, chain chemical reaction can occur, and causes concrete produce spalling and structure is destroyed.There are some researches show, normal concrete is when 800 DEG C of temperature, and dehydration reaction occurs the hydrated calcium silicate (C-S-H) in material, loses its strength of materials.
Heat resistance concrete under 300 ~ 1000 DEG C of high temperature, can not lose its supporting capacity, keeps original physical property, is the Thermal Equipment of the special industries such as metallurgy, chemical industry, oil and building materials and the long-term desirable concrete type used by high temperature action structures.But existing heat resistance concrete production technique has strict material requirements to coarse-fine aggregate, cause its production cost higher.The present invention prepares Problems existing according to existing heat resistance concrete, proposes a kind of heat resistance modified concrete preparation method, can effectively reduce heat resistance concrete manufacturing cost.
Summary of the invention
The technical problem that the present invention mainly solves there is provided a kind of heat resistance modified concrete preparation method, can solve the problems referred to above that existing heat resistance concrete exists.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the preparation method providing a kind of heat resistance concrete, comprises the steps:
(1) raw material prepares: take cement 800 ~ 1000 parts, 3000 ~ 5000 parts, water, fine aggregate 1000 ~ 1500 parts, coarse aggregate 1500 ~ 2000,800 ~ 1000 parts, flyash, water reducer 80 ~ 100 parts, toughener 400 ~ 600 parts, for subsequent use;
(2) coarse aggregate pre-treatment: the water of 1500 ~ 3000 parts is splashed in the coarse aggregate taken in step (1), even dry mixing, ensures coarse aggregate surface wettability;
(3) mortar preparation: by the cement prepared in step (1), fine aggregate, flyash, water reducer, toughener dry mixing mixes, and then adds remaining water, stirs;
(4) mortar mixes with pretreated coarse aggregate: stir under the mortar certain condition prepared in pretreated coarse aggregate in step (2) and step (3);
(5) concrete prefabricated, build: by the mixture of preparation in step (4) conveying grinding tool, maintenance 15 ~ 20 days under certain condition, is prepared heat resistance modified concrete.
In a preferred embodiment of the present invention, described cement is the silicate cement of 42.5 grades.
In a preferred embodiment of the present invention, described coarse aggregate is median size 5 ~ 20nm, apparent density 2500 ~ 3000kg/m
3, tap density 1500 ~ 2000kg/m
3slag stone.
In a preferred embodiment of the present invention, described fine aggregate is the river sand of fineness modulus 2.6.
In a preferred embodiment of the present invention, described flyash is II level.
In a preferred embodiment of the present invention, butyl benzyl phthalate and the poly carboxylic acid mixture of described water reducer to be mass ratio be 3 ~ 5:1 ~ 3.
In a preferred embodiment of the present invention, the mixture of the nano silica fume of described toughener to be mass ratio be 2 ~ 5:3 ~ 7:1 ~ 3:2 ~ 5, dipotassium hydrogen phosphate, magnesium oxide and waste tire rubber material, wherein the median size of nano silica fume is 100 ~ 150nm, and waste tire rubber material mean particle size is 30 μm.
In a preferred embodiment of the present invention, in described step (4), agitation condition is at 50 ~ 80 DEG C, 1000 ~ 1500r/min, stirs 90min.
In a preferred embodiment of the present invention, in described step (5), described curing condition is, humidity keeps more than 75%, and temperature keeps 60 ~ 70 DEG C to continue 5 days, and humidity is constant subsequently, and temperature is elevated to 100 ~ 150 DEG C and continues 10 ~ 15 days.
In a preferred embodiment of the present invention, described heat resistance modified concrete crushing strength 50 ~ 60MPa, tensile strength 3.0 ~ 5.0MPa, tolerable temperature 600 ~ 800 DEG C.
The invention has the beneficial effects as follows: a kind of heat resistance modified concrete preparation method of the present invention, tool has the following advantages:
1) easy and simple to handle, easily realize;
2) the heat resistance modified concrete gravity prepared is light and intensity is high, meets special building industry needs;
3) the heat resistance modified concrete tolerable temperature prepared is high, relative low price, scale can be used for the special dimensions such as metallurgy, chemical industry, oil and building materials.
Embodiment
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The embodiment of the present invention comprises:
Present invention is disclosed a kind of heat resistance modified concrete preparation method, comprise the steps:
(1) raw material prepares: take cement 800 ~ 1000 parts, 3000 ~ 5000 parts, water, fine aggregate 1000 ~ 1500 parts, coarse aggregate 1500 ~ 2000,800 ~ 1000 parts, flyash, water reducer 80 ~ 100 parts, toughener 400 ~ 600 parts, for subsequent use;
(2) coarse aggregate pre-treatment: the water of 1500 ~ 3000 parts is splashed in the coarse aggregate taken in step (1), even dry mixing, ensures coarse aggregate surface wettability;
(3) mortar preparation: by the cement prepared in step (1), fine aggregate, flyash, water reducer, toughener dry mixing mixes, and then adds remaining water, stirs;
(4) mortar mixes with pretreated coarse aggregate: stir under the mortar certain condition prepared in pretreated coarse aggregate in step (2) and step (3);
(5) concrete prefabricated, build: by the mixture of preparation in step (4) conveying grinding tool, maintenance 15 ~ 20 days under certain condition, is prepared heat resistance modified concrete.
Embodiment 1
(1) raw material prepares: the silicate cement 1000 parts taking 42.5 grades; 5000 parts, water; The river sand fine aggregate 1500 parts of fineness modulus 2.6; Median size 5 ~ 20nm, apparent density 2500 ~ 3000kg/m
3, tap density 1500 ~ 2000kg/m
3slag stone coarse aggregate 2000 parts; 1000 parts, II level flyash; Mass ratio is butyl benzyl phthalate and the poly carboxylic acid mixture water reducer 100 parts of 5:3; Mass ratio is the mixture toughener 600 parts of the nano silica fume of 5:7:3:5, dipotassium hydrogen phosphate, magnesium oxide and waste tire rubber material, and wherein the median size of nano silica fume is 100 ~ 150nm, and waste tire rubber material mean particle size is 30 μm, for subsequent use;
(2) coarse aggregate pre-treatment: the water of 3000 parts is splashed in the coarse aggregate taken in step (1), even dry mixing, ensures coarse aggregate surface wettability;
(3) mortar preparation: by the cement prepared in step (1), fine aggregate, flyash, water reducer, toughener dry mixing mixes, and then adds remaining water, stirs;
(4) mortar mixes with pretreated coarse aggregate: by pretreated coarse aggregate in step (2) and middle 50 ~ 80 DEG C, the mortar prepared of step (3), 1500r/min, stirs 90min under condition, stir;
(5) concrete prefabricated, build: by the mixture of preparation in step (4) conveying grinding tool, humidity keeps more than 75%, temperature keeps 70 DEG C to continue 5 days, humidity is constant subsequently, and temperature is elevated to 150 DEG C and continues 10 ~ 15 days, is prepared heat resistance modified concrete.
Embodiment 2
(1) raw material prepares: the silicate cement 800 parts taking 42.5 grades; 3000 parts, water; The river sand fine aggregate 1000 parts of fineness modulus 2.6; Median size 5 ~ 20nm, apparent density 2500 ~ 3000kg/m
3, tap density 1500 ~ 2000kg/m
3slag stone coarse aggregate 1500 parts; 800 parts, II level flyash; Mass ratio is butyl benzyl phthalate and the poly carboxylic acid mixture water reducer 80 parts of 3:1; Mass ratio is the mixture toughener 400 parts of the nano silica fume of 2:3:1:2, dipotassium hydrogen phosphate, magnesium oxide and waste tire rubber material, and wherein the median size of nano silica fume is 100 ~ 150nm, and waste tire rubber material mean particle size is 30 μm, for subsequent use;
(2) coarse aggregate pre-treatment: the water of 1500 parts is splashed in the coarse aggregate taken in step (1), even dry mixing, ensures coarse aggregate surface wettability;
(3) mortar preparation: by the cement prepared in step (1), fine aggregate, flyash, water reducer, toughener dry mixing mixes, and then adds remaining water, stirs;
(4) mortar mixes with pretreated coarse aggregate: by pretreated coarse aggregate in step (2) and middle 50 DEG C, the mortar prepared of step (3), 1000r/min, stirs 90min under condition, stir;
(5) concrete prefabricated, build: by the mixture of preparation in step (4) conveying grinding tool, humidity keeps more than 75%, temperature keeps 60 DEG C to continue 5 days, humidity is constant subsequently, and temperature is elevated to 100 DEG C and continues 10 ~ 15 days, is prepared heat resistance modified concrete.
Heat resistance modified concrete crushing strength 50 ~ 60MPa prepared by aforesaid method, tensile strength 3.0 ~ 5.0MPa, tolerable temperature 600 ~ 800 DEG C.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a heat resistance modified concrete preparation method, is characterized in that, comprise the steps:
(1) raw material prepares: take cement 800 ~ 1000 parts, 3000 ~ 5000 parts, water, fine aggregate 1000 ~ 1500 parts, coarse aggregate 1500 ~ 2000,800 ~ 1000 parts, flyash, water reducer 80 ~ 100 parts, toughener 400 ~ 600 parts, for subsequent use;
(2) coarse aggregate pre-treatment: the water of 1500 ~ 3000 parts is splashed in the coarse aggregate taken in step (1), even dry mixing, ensures coarse aggregate surface wettability;
(3) mortar preparation: by the cement prepared in step (1), fine aggregate, flyash, water reducer, toughener dry mixing mixes, and then adds remaining water, stirs;
(4) mortar mixes with pretreated coarse aggregate: stir under the mortar certain condition prepared in pretreated coarse aggregate in step (2) and step (3);
(5) concrete prefabricated, build: by the mixture of preparation in step (4) conveying grinding tool, maintenance 15 ~ 20 days under certain condition, is prepared heat resistance modified concrete.
2. heat resistance modified concrete preparation method according to claim 1, is characterized in that, in described step (1), described cement is the silicate cement of 42.5 grades.
3. heat resistance modified concrete preparation method according to claim 1, is characterized in that, described coarse aggregate is median size 5 ~ 20nm, apparent density 2500 ~ 3000kg/m
3, tap density 1500 ~ 2000kg/m
3slag stone.
4. heat resistance modified concrete preparation method according to claim 1, is characterized in that, described fine aggregate is the river sand of fineness modulus 2.6.
5. heat resistance modified concrete preparation method according to claim 1, is characterized in that, described flyash is II level.
6. heat resistance modified concrete preparation method according to claim 1, is characterized in that, butyl benzyl phthalate and the poly carboxylic acid mixture of described water reducer to be mass ratio be 3 ~ 5:1 ~ 3.
7. heat resistance modified concrete preparation method according to claim 1, it is characterized in that, the mixture of the nano silica fume of described toughener to be mass ratio be 2 ~ 5:3 ~ 7:1 ~ 3:2 ~ 5, dipotassium hydrogen phosphate, magnesium oxide and waste tire rubber material, wherein the median size of nano silica fume is 100 ~ 150nm, and waste tire rubber material mean particle size is 30.
8. heat resistance modified concrete preparation method according to claim 1, is characterized in that, in described step (4), agitation condition is at 50 ~ 80 DEG C, 1000 ~ 1500r/min, stirs 90min.
9. heat resistance modified concrete preparation method according to claim 1, is characterized in that, in described step (5), described curing condition is, humidity keeps more than 75%, and temperature keeps 60 ~ 70 DEG C to continue 5 days, humidity is constant subsequently, and temperature is elevated to 100 ~ 150 DEG C and continues 10 ~ 15 days.
10. according to the heat resistance modified concrete preparation method one of claim 1 to 9 Suo Shu, it is characterized in that, described heat resistance modified concrete crushing strength 50 ~ 60MPa, tensile strength 3.0 ~ 5.0MPa, tolerable temperature 600 ~ 800 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007536A (en) * | 2016-05-27 | 2016-10-12 | 宜兴市太湖地基工程有限公司 | High-solidification concrete and preparation method thereof |
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| JPH11180743A (en) * | 1997-12-24 | 1999-07-06 | Techno Resource Kk | Shot concrete admixture and shot concrete using the same |
| CN102245530A (en) * | 2008-10-07 | 2011-11-16 | 格兰克雷特公司 | Heat resistant phosphate cement |
| CN103613345A (en) * | 2013-12-05 | 2014-03-05 | 攀枝花环业冶金渣开发有限责任公司 | C55-C65 high-titanium heavy-slag concrete |
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| 四川省公路学会 四川省公路学会工程施工专业委员会编: "《桥梁 道路 隧道 水港—2014年学术交流会论文集》", 31 August 2014 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106007536A (en) * | 2016-05-27 | 2016-10-12 | 宜兴市太湖地基工程有限公司 | High-solidification concrete and preparation method thereof |
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Application publication date: 20160217 |