CN104788050A - Ceramsite lightweight aggregate structural concrete and preparation method thereof - Google Patents
Ceramsite lightweight aggregate structural concrete and preparation method thereof Download PDFInfo
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- CN104788050A CN104788050A CN201510046274.9A CN201510046274A CN104788050A CN 104788050 A CN104788050 A CN 104788050A CN 201510046274 A CN201510046274 A CN 201510046274A CN 104788050 A CN104788050 A CN 104788050A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The present invention provides a ceramsite lightweight aggregate structural concrete made from the following raw materials: 340-382 kg/m<3> of cement, 60-68 kg/m<3> of fly ash, 525-630 kg/m<3> of high-performance ceramsite, 785-610 kg/m<3> of ordinary river sand, 3.2-3.6 kg/m<3> of a water reducing agent and 130-140 kg/m<3> of water; the high-performance ceramsite indexes are as follows: the packing density is about 800 kg/m<3>, the cylinder pressure strength is greater than or equal to 14.6 MPa, and the 1h water absorption is about 9.3%. The ceramsite is prepared by mixing shale and sludge, and burning by a certain technology, by doping of the shale, the ceramsite has high cylinder pressure strength, by use of the sludge, the cost is reduced, and environmental protection is facilitated. Concrete made of the special ceramsite is a lightweight aggregate concrete which has high in strength, good in thermal performance and working performance, and pumpability meeting the requirements of design and construction, the strength grade can achieve LC40, the density grade can achieve 1600 grade, and coefficient of thermal conductivity is 0.65 W/(m.K). The concrete is used in the bearing structure of a self insulation structure system to improve heat preservation performance of the building thermal bridge section, and reduce the occurrence of condensation.
Description
Technical field
The present invention relates to New Building Materials field, concrete preparation field, a kind of light-weight aggregate structural concrete that can be used for load larrying member prepared by the haydite of shale mud mixed sintering is provided.
Background technology
Lightweight aggregate concrete is not more than 1950kg/m by the apparent density that light coarse aggregate, light fine aggregate (or normal sands), cement and water are formulated
3concrete.Wherein, making the formulated lightweight aggregate concrete of aggregate by lightweight fine aggregate is full lightweight concrete; Doing the formulated lightweight aggregate concrete of fine aggregate by normal sands or part lightweight fine aggregate is sand light concrete.Lightweight aggregate concrete, with its lightweight, high-strength, insulation, heat insulation, antidetonation, the functional characteristics such as wear-resisting, is widely used in all kinds of engineering.
Concrete light aggregate mainly comprises: 1, natural weight aggregate: float stone, volcanic cinder; 2, industrial waste: flyash, haydite, expanded slag pearl; 3, artificial light aggregate: haydites of book structure, leca, expanded pearlite rock ceramic granule.Present stage China's light skeletal to use maximum be leca, haydites of book structure and lytag etc., this adds cost undoubtedly, and meanwhile, along with people are to the attention of energy-conserving and environment-protective, the comprehensive utilizating research work of waste becomes a new vital task.The haydite that in the present invention, concrete uses is formed by shale and mud mixed sintering, use shale can ensure that haydite has higher intensity on the one hand, heavy metal in solidification sludge, uses mud effectively can not only reduce the swollen temperature of burning of haydites of book structure and decrease mud to the secondary pollution caused environment after the harm of environment and landfill and burning assistant on the other hand.
Along with the development of light skeletal coagulation scholar research and practice work, its Application Areas is from non bearing structure toward load larrying member future development.Along with the trend that Energy situation and the building energy consumption ratio of sternness constantly rise, the propelling of Building Energy-saving Work is very urgent.Based on this, traditional normal concrete is replaced to be applied to the load larrying member of self-heat conserving structural system light aggregate concrete of the present invention, by the advantage that the thermal conductivity of lightweight aggregate concrete is low, fundamentally improve the heat-insulating property of Building Heat bridge portion, meet specification to mean heat transfer coefficient requirement while, relax the requirement to walling unit thermal conductivity, accomplish self-heat conserving truly.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of concrete prepared by the haydite of shale and firing sludge is provided, and it is successfully applied in the load larrying member of self-heat conserving structural system, meet the requirement of energy-conserving and environment-protective.
A kind of light skeletal structural concrete, comprises following starting material:
Cement, flyash, high performance ceramsite, common river sand, water reducer, water; In every cubic metre of lightweight aggregate concrete, raw material ratio forms as follows: cement 340 ~ 382kg, flyash 60 ~ 68kg, high performance ceramsite (after prewetting) 525 ~ 630kg, common river sand 785 ~ 610kg, water reducer 3.2 ~ 3.6kg, water 130 ~ 140kg;
Preferably, described cement is P042.5 ordinary Portland cement.
Preferably, described cement is one or more the mixture in ordinary Portland cement, early strength silicate cement, aluminosulfate cement, sulfate cement, slag cement.
Preferably, described cement is modified cement, and the meter by weight ratio of described modified cement is as follows:
Attapulgite 20-30 part; Described attapulgite can be preferably attapulgite modified, adopt hcl acidifying modification, modification procedure is: with HCL and the attapulgite of 2 moles often liter, solid-to-liquid ratio 1: 4 stirring reaction after 10 minutes under 60-63 degrees celsius, after obtaining suspension liquid filtration, filtrate is dried.
Water glass 5-10 part;
Caustic soda 3-8 part;
Glass bead 10-15 part;
Anhydrous calcium sulphoaluminate, Dicalcium Phosphate (Feed Grade) and tetracalcium aluminoferrite mixture, weight ratio blending ratio 1: 2: 12-5 part;
Polyacrylamide 1-1.5 part;
PP fiber 1-3 part;
Expanded vermiculite 3-5 part;
Air entrapment agent 5-10 part;
Described air entrapment agent can be preferably: saponins air entrapment agent.
Barium metaborate 1-5 part;
Polysiloxane powder hydrophober 2-5 part;
Epoxy curing agent 2-5 part;
Borax 5-10 part.
Preferably, described flyash is II level flyash, and density is 1.94 ~ 2.35g/cm
3, tap density is 0.63 ~ 0.75g/cm
3, loss on ignition is 5.3 ~ 6.1%, water demand ratio 96 ~ 103%.
Preferably, described high performance ceramsite, by making pellet after shale powder and the abundant mixing and stirring of sludge-drying and being placed on dry 2h in loft drier, is taken out, and then through preheating, roasting, cooling and obtaining, wherein mud percentage ratio is about 30%.
Preferably, described common river grain fineness number modulus is 2.89, and tap density is 1452kg/m
3left and right.
Preferably, described water reducer comprises the component of following weight part: wherein the concentration of esterification monomer solution is 70 ~ 80%, and its solute is the mixture of polyethylene glycol monomethyl ethermethacrylic acid esters, cross-linking monomer triethylene glycolbismethyl-acrylate and methyl methacrylate; Unsaturated monomer is methacrylic acid, vinylformic acid, hydroxyethyl methylacrylate, Hydroxyethyl acrylate, Rocryl 410 or Propylene glycol monoacrylate.
Preferably, strength grade of concrete reaches LC40, and density rating reaches 1600, and thermal conductivity is 0.65W/ (mK).
The preparation method of the light skeletal structural concrete described in 1, described method comprises the steps:
(1) pre-wetted treatment of haydite light-weight aggregate: before light aggregate concrete preparation, light-weight aggregate is put into vessel, adds enough water soakings and gather materials, soaked 24 as a child, be poured on gathering materials on the constant ground, laboratory of humiture, natural air drying 1 ~ 2h is to saturated dry surface, for subsequent use.
(2) concrete mixing process: adopt premixing gelling material mortar method, first cement, flyash, sand, water reducer and water are added in wetting mixing drum and fully stir, then add the light-weight aggregate stir about 3min that pre-wetted treatment is crossed.
Beneficial effect
Compare with existing technology, the invention has the advantages that:
(1) haydite used is formed by shale and firing sludge, and shale and the good consistency of mud not only can be guaranteed the performance of haydite but also be conducive to environmental protection, also can reduce the preparation cost of light aggregate concrete to a certain extent.
(2) structure light aggregate concrete of the present invention has higher strength grade, can be used for load larrying member; There is comparatively low thermal conductivity, in self-heat conserving structural system load larrying member, can Outside wall average heat conducting modulus be reduced, fundamentally can improve the heat-insulating property of Building Heat bridge portion, reduce the appearance of dew condensation phenomenon.
Embodiment
Below in conjunction with embodiment, the present invention is further described in detail, but is not limited to this.
Material selection in embodiment of the present invention is as follows:
Cement: 42.5 grades of ordinary Portland cements;
Flyash: II level flyash is produced in Lanzhou, and density is 2.10g/cm
3, tap density is 0.68g/cm
3, loss on ignition is 5.7%, water demand ratio 98.6%.
Haydite: shale sludge ceramsite prepared by Zhejiang Fangyuan Building Materials Technology Co., Ltd., tap density 804kg/m
3, cylindrical compress strength 14.8MPa, 1h water-intake rate about 9.6%.
Sand: natural river sand, fineness modulus is 2.7, and tap density is 1425kg/m
3.
Water reducer: naphthalene series high-efficiency water-reducing agent.
Water: tap water.
Lightweight aggregate concrete formula described in the present embodiment following (this proportioning): cement 350kg/m
3, flyash 62kg/m
3, high performance ceramsite 575kg/m
3, common river sand 795kg/m
3, naphthalene water reducer 3.3kg/m
3, water 124kg/m
3.
A kind of light skeletal structural concrete, comprises following starting material:
Cement, flyash, high performance ceramsite, common river sand, water reducer, water; In every cubic metre of lightweight aggregate concrete, raw material ratio forms as follows: cement 340 ~ 382kg, flyash 60 ~ 68kg, high performance ceramsite (after prewetting) 525 ~ 630kg, common river sand 785 ~ 610kg, water reducer 3.2 ~ 3.6kg, water 130 ~ 140kg;
Preferably, described cement is P042.5 ordinary Portland cement.
Preferably, described cement is one or more the mixture in ordinary Portland cement, early strength silicate cement, aluminosulfate cement, sulfate cement, slag cement.
Preferably, described cement is modified cement, and the meter by weight ratio of described modified cement is as follows:
Attapulgite 20-30 part; Described attapulgite can be preferably attapulgite modified, adopt hcl acidifying modification, modification procedure is: with HCL and the attapulgite of 2 moles often liter, solid-to-liquid ratio 1: 4 stirring reaction after 10 minutes under 60-63 degrees celsius, after obtaining suspension liquid filtration, filtrate is dried.
Water glass 5-10 part;
Caustic soda 3-8 part;
Glass bead 10-15 part;
Anhydrous calcium sulphoaluminate, Dicalcium Phosphate (Feed Grade) and tetracalcium aluminoferrite mixture, weight ratio blending ratio 1: 2: 12-5 part;
Polyacrylamide 1-1.5 part;
PP fiber 1-3 part;
Expanded vermiculite 3-5 part;
Air entrapment agent 5-10 part;
Barium metaborate 1-5 part;
Polysiloxane powder hydrophober 2-5 part;
Epoxy curing agent 2-5 part;
Borax 5-10 part.
Preferably, described flyash is II level flyash, and density is 1.94 ~ 2.35g/cm
3, tap density is 0.63 ~ 0.75g/cm
3, loss on ignition is 5.3 ~ 6.1%, water demand ratio 96 ~ 103%.
Preferably, described high performance ceramsite, by making pellet after shale powder and the abundant mixing and stirring of sludge-drying and being placed on dry 2h in loft drier, is taken out, and then through preheating, roasting, cooling and obtaining, wherein mud percentage ratio is about 30%.
Preferably, described common river grain fineness number modulus is 2.89, and tap density is 1452kg/m
3left and right.
Preferably, described water reducer comprises the component of following weight part: wherein the concentration of esterification monomer solution is 70 ~ 80%, and its solute is the mixture of polyethylene glycol monomethyl ethermethacrylic acid esters, cross-linking monomer triethylene glycolbismethyl-acrylate and methyl methacrylate; Unsaturated monomer is methacrylic acid, vinylformic acid, hydroxyethyl methylacrylate, Hydroxyethyl acrylate, Rocryl 410 or Propylene glycol monoacrylate.
Preferably, strength grade of concrete reaches LC40, and density rating reaches 1600, and thermal conductivity is 0.65W/ (mK).
The preparation method of the light skeletal structural concrete described in 1, described method comprises the steps:
(1) pre-wetted treatment of haydite light-weight aggregate: before light aggregate concrete preparation, light-weight aggregate is put into vessel, adds enough water soakings and gather materials, soaked 24 as a child, be poured on gathering materials on the constant ground, laboratory of humiture, natural air drying 1 ~ 2h is to saturated dry surface, for subsequent use.
(2) concrete mixing process: adopt premixing gelling material mortar method, first cement, flyash, sand, water reducer and water are added in wetting mixing drum and fully stir, then add the light-weight aggregate stir about 3min that pre-wetted treatment is crossed.
Above-mentioned concrete is in the load larrying member such as beam, plate, post of Zhejiang University's building energy conservation and green building equal-scale laboratory building, and this laboratory building adopts ceramicite-reinforced aerated block, diatomite (porous) insulating brick, sintering heat-reserving brick, sintering shale insulation blocks, sand aerated concrete block 5 kinds of heat insulating wall materials.After building up, energy consumption is carried out to laboratory building and monitors in real time, show that this self-heat conserving structural system has good heat preservation and energy conservation effects.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.
Claims (10)
1. a light skeletal structural concrete, is characterized in that comprising following starting material:
Cement, flyash, high performance ceramsite, common river sand, water reducer, water; In every cubic metre of lightweight aggregate concrete, raw material ratio forms as follows: cement 340 ~ 382kg, flyash 60 ~ 68kg, high performance ceramsite (after prewetting) 525 ~ 630kg, common river sand 785 ~ 610kg, water reducer 3.2 ~ 3.6kg, water 130 ~ 140kg.
2. light skeletal structural concrete as claimed in claim 1, it is characterized in that, described cement is P042.5 ordinary Portland cement.
3. light skeletal structural concrete as claimed in claim 1, it is characterized in that, described cement is one or more the mixture in ordinary Portland cement, early strength silicate cement, aluminosulfate cement, sulfate cement, slag cement.
4. light skeletal structural concrete as claimed in claim 1, it is characterized in that, described cement is modified cement, and the meter by weight ratio of described modified cement is as follows:
Attapulgite 20-30 part;
Water glass 5-10 part;
Caustic soda 3-8 part;
Glass bead 10-15 part;
Anhydrous calcium sulphoaluminate, Dicalcium Phosphate (Feed Grade) and tetracalcium aluminoferrite mixture, weight ratio blending ratio 1: 2: 12-5 part;
Polyacrylamide 1-1.5 part;
PP fiber 1-3 part;
Expanded vermiculite 3-5 part;
Air entrapment agent 5-10 part;
Barium metaborate 1-5 part;
Polysiloxane powder hydrophober 2-5 part;
Epoxy curing agent 2-5 part;
Borax 5-10 part.
5. light skeletal structural concrete as claimed in claim 1, it is characterized in that, described flyash is II level flyash, and density is 1.94 ~ 2.35g/cm
3, tap density is 0.63 ~ 0.75g/cm
3, loss on ignition is 5.3 ~ 6.1%, water demand ratio 96 ~ 103%.
6. light skeletal structural concrete as claimed in claim 1, it is characterized in that, described high performance ceramsite is by making pellet after shale powder and the abundant mixing and stirring of sludge-drying and being placed on dry 2h in loft drier, taken out, then through preheating, roasting, cooling and obtaining, wherein mud percentage ratio is about 30%.
7. light skeletal structural concrete as claimed in claim 1, it is characterized in that, described common river grain fineness number modulus is 2.89, and tap density is 1452kg/m
3left and right.
8. as the light skeletal structural concrete in claim 1-7 as described in any one, it is characterized in that, described water reducer comprises the component of following weight part: wherein the concentration of esterification monomer solution is 70 ~ 80%, and its solute is the mixture of polyethylene glycol monomethyl ethermethacrylic acid esters, cross-linking monomer triethylene glycolbismethyl-acrylate and methyl methacrylate; Unsaturated monomer is methacrylic acid, vinylformic acid, hydroxyethyl methylacrylate, Hydroxyethyl acrylate, Rocryl 410 or Propylene glycol monoacrylate.
9. light skeletal structural concrete as claimed in claim 1, it is characterized in that, strength grade of concrete reaches LC40, and density rating reaches 1600, and thermal conductivity is 0.65W/ (mK).
10. the preparation method of light skeletal structural concrete as claimed in claim 1, it is characterized in that, described method comprises the steps:
(1) pre-wetted treatment of haydite light-weight aggregate: before light aggregate concrete preparation, light-weight aggregate is put into vessel, adds enough water soakings and gather materials, soaked 24 as a child, be poured on gathering materials on the constant ground, laboratory of humiture, natural air drying 1 ~ 2h is to saturated dry surface, for subsequent use.
(2) concrete mixing process: adopt premixing gelling material mortar method, first cement, flyash, sand, water reducer and water are added in wetting mixing drum and fully stir, then add the light-weight aggregate stir about 3min that pre-wetted treatment is crossed.
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105369958A (en) * | 2015-12-11 | 2016-03-02 | 邱继强 | Multi-duct cold-hot air circulation building module and constitution thereof |
| CN105948788A (en) * | 2016-04-26 | 2016-09-21 | 吉林省新生建筑工程公司 | Lightweight aggregate concrete |
| CN106396557A (en) * | 2016-09-18 | 2017-02-15 | 广西棕海园林工程有限公司 | Ceramic tile adhesive mortar and preparation method thereof |
| CN107352863A (en) * | 2017-06-09 | 2017-11-17 | 深圳市绿志新型建材研究院有限公司 | A kind of sludge strengthens non-burning brick and preparation method thereof |
| CN107601991A (en) * | 2017-10-17 | 2018-01-19 | 徐宏伟 | A kind of thermal insulation concrete and its preparation technology of radiation proof anticracking |
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| CN109608100A (en) * | 2018-12-04 | 2019-04-12 | 陈群 | A kind of concrete self-insulating composite lightweight block and its production technology |
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| CN113816657A (en) * | 2021-09-02 | 2021-12-21 | 上海建工集团股份有限公司 | Economic and environment-friendly all-light concrete and preparation method thereof |
| CN114057459A (en) * | 2021-11-20 | 2022-02-18 | 惠州市春林建筑工程有限公司 | Green lightweight aggregate concrete and floor construction method |
| CN115417636A (en) * | 2022-08-15 | 2022-12-02 | 广州市第三市政工程有限公司 | Green high-performance concrete based on renewable lightweight aggregate and preparation method and application thereof |
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