CN104386978A - Plant fiber lightweight aggregate-raw soil thermal insulation block and preparation method thereof - Google Patents

Plant fiber lightweight aggregate-raw soil thermal insulation block and preparation method thereof Download PDF

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Publication number
CN104386978A
CN104386978A CN201410554583.2A CN201410554583A CN104386978A CN 104386978 A CN104386978 A CN 104386978A CN 201410554583 A CN201410554583 A CN 201410554583A CN 104386978 A CN104386978 A CN 104386978A
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China
Prior art keywords
cement
lime
immature soil
water
agent
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Pending
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CN201410554583.2A
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Chinese (zh)
Inventor
曲烈
王渊
杨久俊
刘志华
刘洪丽
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Tianjin Chengjian University
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Tianjin Chengjian University
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Priority to CN201410554583.2A priority Critical patent/CN104386978A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a plant fiber lightweight aggregate-raw soil thermal insulation block. The plant fiber lightweight aggregate-raw soil thermal insulation block comprises the following components in percentage by weight: 40-75% of straw lightweight aggregate, 10-30% of cement, 0-10% of lime, 10-30% of raw soil, 0-10% of an expanding agent, and 0.5-2% of a water reducing agent and 0.2-1% of a water repellent agent based on the total weight of the lime, the cement, the raw soil and the expanding agent. The plant fiber lightweight aggregate-raw soil thermal insulation block prepared by a preparation method disclosed by the invention has the advantages of light weight, high strength, better heat preservation and heat insulation, excellent sound insulation, sound absorption and durability, uniform and stable mechanical properties and the like; in view of an actual situations in rural areas in China, the plant fiber lightweight aggregate-raw soil thermal insulation block has an important practical significance and a significant application value for promoting the development of a building energy saving technology in the rural areas in China.

Description

A kind of vegetable fibre light skeletal immature soil insulation blocks and preparation method thereof
Technical field
The present invention relates to a kind of vegetable fibre light skeletal immature soil insulating wall material, belong to building materials technical field.
Background technology
China is a large agricultural country, and agricultural straw resource is very abundant, produces stalk about 700,000,000 tons per year, occupies first place in the world.In recent years, along with China's rapid economic development, rural energy structure there occurs considerable change, traditional reduces year by year using the demand of stalk as life fuel, cause most stalk to remain to pile up, people often one of general have burnt it, not only serious environment pollution, cause haze weather, waste a large amount of renewable resources.
Take the immature soil as the advantage that material of construction prepared by raw material has other material of construction to replace.After raw soil building material uses, entering natural ecological recycle system through pulverizing can be sprinkled in soil thereupon, preparing with the immature soil load that material of construction can reduce resource and environment.
Immature soil modification technology refers to by certain technique, excitation material is added in the immature soil, utilize the series of physical chemical reaction of raw soil material inside generation by soil particle cementation, thus change original structure and the character of raw soil material, reach the object strengthening its physical and mechanical property.Chinese scholars studying the immature soil is carried out inorganic modified, organically-modified, but targets of these researchs are that intensity is all lower in order to modified raw soil material is used for road or roadbed etc. mostly, thisly material modifiedly cannot to use as materials for wall.
Traditional compacting immature soil materials for wall from great, with soil many, thermal conductivity is high, and the power consumption such as vitrified brick is high, pollution is heavy, particularly thickness is less than the body of wall of 300mm at present, does not meet the 3rd step requirement of national energy-saving standard, is therefore badly in need of the better thermal and insulating performance materials for wall of development.Rural area is as China's population, resource and energy consumption and build major domain and region, if utilize the exploitation of the local materials such as stalk and the immature soil to prepare material of construction, the feature of its regeneration had, energy saving standard, for developing a circular economy, promoting, China's rural economy sustained and rapid development is of great practical significance, and very wide application prospect.
In the middle of the new countryside construction that current China carries out, how can make full use of local existing resource with suiting measures to local conditions, the materials for wall preparing novel energy-saving environment-friendly is very urgent, the to be badly in need of task of China's building material industry one of facing.
Summary of the invention
The practical situation of the present inventor according to Chinese countryside and the requirement of new countryside construction, have developed a kind of New-type heat insulating wall building material first.
The object of the present invention is to provide a kind of vegetable fibre light skeletal immature soil insulation blocks and preparation method thereof.
The weight of vegetable fibre light skeletal immature soil insulation blocks of the present invention consists of: straw light aggregate 40 ~ 75%, cement 10 ~ 30%, lime 0 ~ 10%, the immature soil 10 ~ 30%, swelling agent 0 ~ 10% and cement, lime, the immature soil, the water reducer of swelling agent gross weight 0.5 ~ 2% and the water repellent agent of 0.2 ~ 1%.
Described straw light aggregate is formed through cutting rice straw, straw, cornstalk, jowar stalk, tabacco straw, paddy stalk, cotton stalk, beans stalk or other various stalk.
Described swelling agent is one in lime swelling agent, aluminium sulfate expanding agent or its mixture.
Described cement is the silicate cement of 32.5 grades, 42.5 grades, 52.5 grades, ordinary Portland cement, pulverized fuel ash cement, slag cement, the one in trass cement or its mixture.
Described water repellent agent is stearic acid tensio-active agent.
Described water reducer is one in sulfonated lignin, naphthalene system, polycarboxylic acid, fats water reducer or its mixture.
Different according to the application target of building block, cement can be replaced with the consolidating material such as lime, gypsum.
Vegetable fibre light skeletal immature soil insulation blocks of the present invention can be prepared by the following method, and step comprises:
1) straw light aggregate, the immature soil, cement, lime, swelling agent and water reducer and water repellent agent is got by described weight ratio; And press the water intaking of water material weight ratio 0.2 ~ 0.3, for subsequent use.
2) water reducer is put into container, add water to be stirred to and dissolve completely.
3) immature soil, cement, straw light aggregate, swelling agent, lime and water repellent agent are put into stirrer, pour step 2 into) obtained water reducer solution, stir; Remaining water is all added, stirs.
4) by step 3) gained mix pours in advance in ready mould; Mould is put into shaking table vibration 3 ~ 5 minutes, carry out closely knit shaping; Leave standstill 24 hours afterwards, the demoulding.
5) by step 4) gained building block, get product after 8-12 hour through seasoning maintenance 28 days or artificial seasoning maintenance.
Advantage and disadvantage of the present invention:
1., for China's country practical situation, for making full use of a large amount of stalks and the immature soil provides innovative technology, to the development promoting China's farm building power-saving technology, have important practical significance and significant using value, market outlook are very wide.
2., compared with existing raw soil material, advantage is obvious, more meets the needs of modern building material, more meets the needs of construction of modern new rural village:
A) heat insulating more.Tradition loam wall and sun-dried mud brick heat transfer coefficient are about 1.0W/ (m*K), heat insulation poor with insulated capacity; And product heat transfer coefficient of the present invention is not more than 0.25W/ (m*K), heat insulation good with insulated capacity, can building thermal environments be improved.
B) lightweight.Product dry density of the present invention is only 800 ~ 1200kg/m 3, traditional immature soil loam wall and adobe wall are conducted oneself with dignity about 1800kg/m3, and sintering brick wall is conducted oneself with dignity about 1600-1800kg/m 3.Body of wall deadweight gentlier can alleviate structural weight per square meter, reduces scantling, reduces key dimension, saves material, improves structural seismic performance.
C) high-strength, water resistant and splitting resistance good.Compression strength value reaches more than 3MPa.Although vitrified brick intensity is higher, traditional immature soil loam wall and sun-dried mud brick ultimate compression strength are only 0.5-1MPa; Product appearance of the present invention is fine and close, and leakless produces.
D) sound insulation, sound-absorbing, superior in durability.
E) mechanical property stable homogeneous.Because have employed same proportioning, the compression strength value discreteness of the immature soil building block made is little, and construction quality is more guaranteed.
F) make raw material to be easy to get, can gather materials on the spot; Manufacture craft is simple, meets green construction material basic norm.
3. raw material sources extensively, can gather materials on the spot, preparation technology is simple, facility investment is little, with low cost, maintenance convenient, be convenient to apply in the vast Rural areas of China.
Accompanying drawing explanation
Fig. 1: be vegetable fibre light skeletal of the present invention
Fig. 2: the electronic scanning figure being vegetable fibre light skeletal immature soil insulation blocks of the present invention
Wherein: 1. vegetable fibre light skeletal, 2. the immature soil is material modified
Embodiment
In order to understand the present invention, below in conjunction with embodiment, the present invention will be further described, but do not limit the present invention.
Embodiment 1: prepare vegetable fibre light skeletal immature soil insulation blocks
1) lime is levigate, cross 0.075mm sieve; Get straw light aggregate 60%, the immature soil 20%, ordinary Portland cement 14%, lime 2%, aluminium sulfate expanding agent 4% and the immature soil, cement, lime, the naphthalene water reducer of swelling agent four gross weights 0.8% and the stearic acid tensio-active agent water repellent agent of 0.2% by weight; Component of getting is siccative; And be 0.3 water intaking by water material weight ratio, for subsequent use.
2) water reducer is put into container, add water to be stirred to dissolve completely and make water reducer solution.
3) immature soil, cement, straw light aggregate, swelling agent, lime and water repellent agent are put into stirrer, pour step 2 into) obtained water reducer solution, stir; Add the water of remainder again, stir.Mix is poured in advance in ready mould; Mould is put into shaking table vibration 3 ~ 5 minutes, carry out closely knit shaping; Leave standstill 24 hours afterwards, the demoulding.Gained building block after 8-12 hour, obtains vegetable fibre light skeletal immature soil insulation blocks finished product through seasoning maintenance 28 days or artificial seasoning maintenance.
Gained block performance index is excellent, and its heat transfer coefficient is less than 0.25W/ (m*K) after tested, and dry density is 900kg/m 3, compression strength value is more than 3MPa; Result shows that this building block light weight is high-strength, heat insulation, insulated capacity good, and water resistant resistance to cleavage is strong.This building block can be used for non-load bearing wall, the building by laying bricks or stones of bearing wall.
By the ordinary Portland cement cement in the present embodiment with the silicate cement of 32.5 grades, 42.5 grades, 52.5 grades, ordinary Portland cement, pulverized fuel ash cement, slag cement, or trass cement is replaced, the insulation blocks prepared has heat transfer coefficient too and is less than 0.25W/ (m*K), and compression strength value is greater than the feature of 3MPa.
Embodiment 2
Get straw light aggregate 60%, the immature soil 15%, cement 20%, lime 1%, swelling agent 4% and the immature soil, cement, lime, the naphthalene water reducer of lime swelling agent weight sum 0.6% and the stearic acid tensio-active agent water repellent agent of 0.4% by weight.
All the other are with embodiment 1 and operate by embodiment 1, obtain vegetable fibre light skeletal immature soil insulation blocks.Test result is: heat transfer coefficient is less than 0.25W/ (m*K), and compression strength value is more than 3MPa.
Embodiment 3
Get straw light aggregate 50%, the immature soil 25%, cement 15%, lime 5%, swelling agent 5% and the immature soil, cement, lime, the polycarboxylic acids dehydragent of lime swelling agent gross weight 0.8% and the stearic acid tensio-active agent water repellent agent of 1% by weight.
All the other are with embodiment 1 and operate by embodiment 1, obtain vegetable fibre light skeletal immature soil insulation blocks.Test result is: heat transfer coefficient is less than 0.25W/ (m*K), and compression strength value is more than 3MPa.

Claims (4)

1. a vegetable fibre light skeletal immature soil insulation blocks, it is characterized in that weight consists of: straw light aggregate 40 ~ 75%, cement 10 ~ 30%, lime 0 ~ 10%, the immature soil 10 ~ 30%, swelling agent 0 ~ 10% and cement, lime, the immature soil, the water reducer of swelling agent gross weight 0.5 ~ 2% and the water repellent agent of 0.2 ~ 1%.
Described straw light aggregate is formed through cutting rice straw, straw, cornstalk, jowar stalk, tabacco straw, paddy stalk, cotton stalk, beans stalk or other various stalk;
Described swelling agent is one in lime swelling agent, aluminium sulfate expanding agent or its mixture;
Described cement is the silicate cement of 32.5 grades, 42.5 grades, 52.5 grades, ordinary Portland cement, pulverized fuel ash cement, slag cement, the one in trass cement or its mixture;
Described water repellent agent is stearic acid tensio-active agent;
Described water reducer is one in sulfonated lignin, naphthalene system, polycarboxylic acid, fats water reducer or its mixture.
2. a kind of vegetable fibre light skeletal immature soil insulation blocks as claimed in claim 1, is characterized in that weight consists of: 0.6% water reducer of straw light aggregate 60%, the immature soil 15%, cement 20%, lime 1%, swelling agent 4% and the immature soil, cement, lime, swelling agent weight sum and 0.4% water repellent agent.
3. a kind of vegetable fibre light skeletal immature soil insulation blocks as claimed in claim 1, is characterized in that weight consists of: 0.8% water reducer of straw light aggregate 50%, the immature soil 25%, cement 15%, lime 5%, swelling agent 5% and the immature soil, cement, lime, swelling agent weight sum and 1% water repellent agent.
4. the preparation method of a kind of vegetable fibre light skeletal immature soil insulation blocks as claimed in claim 1, is characterized in that step comprises:
1) straw light aggregate, the immature soil, cement, lime, swelling agent and water reducer and water repellent agent is got by described weight ratio; And press the water intaking of water material weight ratio 0.2 ~ 0.3, for subsequent use;
2) water reducer is put into container, add water to be stirred to and dissolve completely;
3) immature soil, cement, straw light aggregate, swelling agent, lime and water repellent agent are put into stirrer, pour step 2 into) obtained water reducer solution, stir; Remaining water is all added, stirs;
4) by step 3) gained mix pours in advance in ready mould; Mould is put into shaking table vibration 3 ~ 5 minutes, carry out closely knit shaping; Leave standstill 24 hours afterwards, the demoulding;
5) by step 4) gained building block, get product after 8-12 hour through seasoning maintenance 28 days or artificial seasoning maintenance.
CN201410554583.2A 2014-10-17 2014-10-17 Plant fiber lightweight aggregate-raw soil thermal insulation block and preparation method thereof Pending CN104386978A (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104891871A (en) * 2015-05-15 2015-09-09 长安大学 Modified raw soil material
CN104989008A (en) * 2015-06-24 2015-10-21 齐齐哈尔大学 Construction process of cement steel wire mesh raw soil rice straw composite wall body
CN106810174A (en) * 2017-01-20 2017-06-09 天津市建筑工程质量检测中心 A kind of raw-soil base aerated insulation block dispensing and its preparation method of building block
CN110143788A (en) * 2019-06-25 2019-08-20 盈创新材料(苏州)有限公司 Heat-insulating dried-powder, heat preservation slurry and its application, building materials, heat-preserving wall
CN111018450A (en) * 2020-01-02 2020-04-17 北华大学 Method for manufacturing corn stalk heat-insulation concrete masonry material
CN111099866A (en) * 2019-12-30 2020-05-05 同济大学 Thermal insulation building block prepared from plant fiber modified waste soil and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2398803A (en) * 2003-02-28 2004-09-01 Sam William Bernard Owen Walling blocks comprising clay and straw
CN1765808A (en) * 2005-09-01 2006-05-03 郭弋 Straw fiber cement composite material
CN101941849A (en) * 2010-08-11 2011-01-12 东南大学 Straw cement based compound porous self-heat-insulating material and preparation method thereof
CN102310460A (en) * 2011-08-31 2012-01-11 兰州理工大学 Production method for straw green cob brick and building block

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2398803A (en) * 2003-02-28 2004-09-01 Sam William Bernard Owen Walling blocks comprising clay and straw
CN1765808A (en) * 2005-09-01 2006-05-03 郭弋 Straw fiber cement composite material
CN101941849A (en) * 2010-08-11 2011-01-12 东南大学 Straw cement based compound porous self-heat-insulating material and preparation method thereof
CN102310460A (en) * 2011-08-31 2012-01-11 兰州理工大学 Production method for straw green cob brick and building block

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104891871A (en) * 2015-05-15 2015-09-09 长安大学 Modified raw soil material
CN104989008A (en) * 2015-06-24 2015-10-21 齐齐哈尔大学 Construction process of cement steel wire mesh raw soil rice straw composite wall body
CN106810174A (en) * 2017-01-20 2017-06-09 天津市建筑工程质量检测中心 A kind of raw-soil base aerated insulation block dispensing and its preparation method of building block
CN110143788A (en) * 2019-06-25 2019-08-20 盈创新材料(苏州)有限公司 Heat-insulating dried-powder, heat preservation slurry and its application, building materials, heat-preserving wall
CN111099866A (en) * 2019-12-30 2020-05-05 同济大学 Thermal insulation building block prepared from plant fiber modified waste soil and preparation method thereof
CN111099866B (en) * 2019-12-30 2021-03-26 同济大学 Thermal insulation building block prepared from plant fiber modified waste soil and preparation method thereof
CN111018450A (en) * 2020-01-02 2020-04-17 北华大学 Method for manufacturing corn stalk heat-insulation concrete masonry material

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Application publication date: 20150304