CN1131131A - Cement-like soil firming agent - Google Patents

Cement-like soil firming agent Download PDF

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Publication number
CN1131131A
CN1131131A CN 95112494 CN95112494A CN1131131A CN 1131131 A CN1131131 A CN 1131131A CN 95112494 CN95112494 CN 95112494 CN 95112494 A CN95112494 A CN 95112494A CN 1131131 A CN1131131 A CN 1131131A
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CN
China
Prior art keywords
soil
cement
anhydrite
portland clinker
days
Prior art date
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Granted
Application number
CN 95112494
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Chinese (zh)
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CN1044799C (en
Inventor
刘顺妮
林宗寿
陈云波
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Wuhan Polytechnic University
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Wuhan Polytechnic University
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Priority to CN95112494A priority Critical patent/CN1044799C/en
Publication of CN1131131A publication Critical patent/CN1131131A/en
Application granted granted Critical
Publication of CN1044799C publication Critical patent/CN1044799C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/48—Clinker treatment
    • C04B7/52—Grinding ; After-treatment of ground cement
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/02—Alcohols; Phenols; Ethers
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The portland cement clinker and anhydrite or portland cement clinker, anhydrite and glycerine are mixed, ground or respectively ground, and then mixed uniformly so as to obtain a cement type soil solidifying agent. Said solidifying agent is applicable to solidification of soil whose water content is 35-60% (the ratio is occupied in dried soil). As compared with the strength of the soil solidified by portland cement, the strength of the soil solidified by said invented solidifying agent is greatly raised, and the cement consumption also can be reduced.

Description

A kind of cement-like soil firming agent
The invention belongs to material of construction cement class.
The ground of various buildingss and the basic unit of road and subbase often need to add solidifying agent such as cement to improve its intensity, if but the soil moisture content of working-yard higher (as greater than 35%), existing cement-like soil firming agent could satisfy requirement of strength when having only its consumption of increasing, and will certainly increase construction cost like this.
The objective of the invention is to save cement consumption, reduce construction cost, improve the intensity of soil-cement simultaneously, propose in Portland clinker, to add anhydrite and (or) glycerol, produce a kind of cement-like soil firming agent.
Advantage of the present invention is to produce a kind of cement-like soil firming agent, and this soil-solidified-agent is applicable to and solidifies the soil that water ratio accounts for dry ground ratio 35～60% that the earth intensity of its solidified earth strength ratio cement solidification has raising by a relatively large margin.
The present invention is described in detail as follows:
The intensity of soil-cement (abbreviation cement-earth) is mainly derived from the cementation of two portions hydrate, i.e. the Ca (OH) that produces when the cementation of the hydrated product of cement itself and hydrated cementitious 2And the hard cementation of reacting the hydrated product that is produced of coagulating in the soil between the active substance.Wherein the former constitutes the major portion of soil cement intensity.Only starch structure for silicate cement, in Portland clinker, add anhydrite after, to C 3S, C 2The effect of S aquation is little, but can impel C 3A, C 4The AF aquation forms the hydrated product of acicular structure, ettringite that intensity is high and so on, and the crystal water height that this class hydrated product is contained, can be under same water cement ratio condition, reduce the porosity of cement stone, improve the intensity of cement stone, but when gypsum addition is too much, can continue to form ettringite in the later stage, the slurry that causes the initial stage to harden produces expansion stress, has weakened intensity, the serious stability bad consequence of also can causing.For this reason, national Specification SO in the silicate cement 3Content must not be greater than 3.5%, with the volume of restriction gypsum.But 3.5% SO 3Can only make 3.93%C at most 3A is combined to ettringite.And C in the silicate cement 3A, C 4The content of AF is respectively 6%, 15%, make these C 3A and C 4AF all is combined to ettringite, then needs about 20% SO 3Content.C in the obvious existing portland-type cement 3A and C 4The main aquation of AF becomes the sour calcium of aquation aluminium (iron), forms the ettringite amount seldom, thereby their whole effects do not give full play to as yet, desires to make C 3A and C 4The intensity of AF is given full play to, and must make them synthesize ettringite with gypsification as far as possible morely, but should avoid producing expansion stress.
Because the hole in the cement-earth is a lot, so can relax gypsum addition, generates more ettringite and comes filling pore and can not cause stability bad.Glycerol is a kind of tensio-active agent, can make Portland clinker mineral aquation more complete, and can strengthen the activity of soil particle mineral, thereby can further improve the intensity of cement-earth.
With Portland clinker and anhydrite, or with Portland clinker, anhydrite and glycerol combined grinding, or the difference grinding is to specific surface area 250～900m 2/ kg, best 300～500m 2/ kg can produce the cement class solidifying agent that is applicable to high-moisture soil.Used Portland clinker refers to the Portland clinker that existing each cement mill produces among the present invention.Anhydrite is a natural anhydrite or through the dehydrated gyp-s of 600～1100 ℃ of calcining dihydrate gypsum gained, its main component is CaSO 4, the volume of anhydrite accounts for 6～25% in solidifying agent, the optimum mix amount 8～18%, volume very little, effect is not remarkable, volume is too many, and soil cement intensity is reduced.Glycerol is commercially available Chemicals, and volume accounts for 0.05～0.8% in solidifying agent, the optimum mix amount 0.1～0.4%, volume very little, effect is not remarkable, volume is too many, and soil cement intensity is reduced.
Example 1
Raw materials used chemical ingredients sees Table 1.
Table 1
Raw material SiO 2 Al 2O 3 ?Fe 2O 3 ?CaO ?MgO ????SO 3 ????IL
Portland clinker 20.64 ?5?65 ?5.00 ?64.40 ?1.46 ????0.60 ????1.41
Silicate cement 19.66 ?5.39 ?4.75 ?67.56 ?1.39 ????2.82 ????2.40
Soil 68.42 ?13.85 ?4.85 ?2.52 ?2.00 ????/ ????4.38
Anhydrite 10.29 ??2.46 ?0.91 ?33.30 ?2.97 ????41.9 ????6.06
The pH value of soil is 7.4.
The prescription of soil-solidified-agent of the present invention and existing soil-solidified-agent sees Table 2.
Table 2
Technology Numbering Portland clinker Silicate cement Anhydrite
The present invention ????A1 ????94 ?????/ ????6
The present invention ????A2 ????90 ?????/ ????10
The present invention ????A3 ????86 ?????/ ????14
The present invention ????A4 ????82 ?????/ ????18
The present invention ????A5 ????74 ?????/ ????26
Existing ????A6 ?????/ ????100 ????/
For ease of the control fineness, Portland clinker, anhydrite difference grinding, mix thoroughly by the mixing of the prescription shown in the table 2, obtain specific surface area and be 397m 2Each of/kg number soil-solidified-agent sample mixes them and carries out ruggedness test in the earth.The soil-solidified-agent volume is 15% (accounting for the dry ground ratio), soil moisture content is 48% (accounting for the dry ground ratio), and 4 * 4 * 16cm tries body, vibratory compaction, (20 ℃) constant humidity of constant temperature in the wet box of strict seal (100%) maintenance, broken type were immersed in 20 ℃ the water maintenance the day before yesterday one day.Gained the results are shown in Table 3.
Table 3
Sample Soil moisture content % Folding strength MPa Ultimate compression strength MPa
3 days 7 days 28 days 3 days 7 days 28 days
????A1 ????48 ????0.70 ????0.88 ????1.22 ????1.42 ????2.13 ????3.98
????A2 ????48 ????0.81 ????1.04 ????1.36 ????1.63 ????2.40 ????4.22
????A3 ????48 ????0.78 ????0.94 ????1.33 ????1.58 ????2.38 ????4.19
????A4 ????48 ????0.75 ????0.88 ????1.24 ????1.50 ????2.25 ????4.00
????A5 ????48 ????0.60 ????0.73 ????1.20 ????1.20 ????1.94 ????3.86
????A6 ????48 ????0.29 ????0.70 ????1.19 ????1.04 ????1.76 ????3.72
According to the proportioning of A2 sample in the table 2, Portland clinker and anhydrite combined grinding to different fineness.The solidifying agent of gained different fineness mixed carry out ruggedness test in the earth again, experiment condition is the same.Gained the results are shown in Table 4.Table 4
Sample Specific surface area m 2/kg Folding strength MPa Ultimate compression strength MPa
3 days 7 days 28 days 3 days 7 days 28 days
????A2 ????250 ????0.75 ????0.99 ????1.29 ????1.35 ????2.01 ????3.82
????A2 ????397 ????0.81 ????1.04 ????1.36 ????1.63 ????2.40 ????4.22
????A2 ????507 ????0.82 ????1.05 ????1.36 ????1.68 ????2.45 ????4.28
????A2 ????619 ????0.85 ????1.05 ????1.37 ????1.72 ????2.48 ????4.31
????A2 ????900 ????0.87 ????1.06 ????1.37 ????1.74 ????2.50 ????4.31
When soil moisture content not simultaneously, in the different soil of these water ratio, mix A2 solidifying agent in the table 2 and carry out intensity Lian again and test.Except that soil moisture content changed, all the other conditions were the same, and gained the results are shown in Table 5.
Table 5
Sample Soil moisture content % Folding strength MPa Ultimate compression strength MPa
3 days 7 days 28 days 3 days 7 days 28 days
????A2 ????35 ????0.98 ????1.20 ????1.57 ????2.12 ????2.98 ????4.83
????A2 ????40 ????0.90 ????1.11 ????1.45 ????1.95 ????2.78 ????4.55
????A2 ????48 ????0.81 ????1.04 ????1.36 ????1.63 ????2.40 ????4.22
????A2 ????60 ????0.20 ????0.38 ????0.80 ????0.55 ????1.05 ????1.83

Claims (2)

1. a cement-like soil firming agent is characterized in that Portland clinker and anhydrite, or with Portland clinker, anhydrite and glycerol combined grinding to specific surface area 250～900m 2/ kg, or the difference grinding is to specific surface area 250～900m 2Remix is mixed thoroughly behind/the kg, and the specific surface area optimum range is at 300～500m 2/ kg.
2. according to right 1 described a kind of cement-like soil firming agent, it is characterized in that by Portland clinker and anhydrite, or form by Portland clinker, anhydrite and glycerol.Its compositing range:
Composition weight is formed % optimum range %
Portland clinker 74～93 81～91
Anhydrite 6～25 8～18
Glycerol 0.05～0.8 0.1～0.4
CN95112494A 1995-10-20 1995-10-20 Cement-like soil firming agent Expired - Fee Related CN1044799C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN95112494A CN1044799C (en) 1995-10-20 1995-10-20 Cement-like soil firming agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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CN1044799C CN1044799C (en) 1999-08-25

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1067663C (en) * 1998-06-12 2001-06-27 武汉水利电力大学 Soil solidifying agent
CN1301929C (en) * 2003-05-07 2007-02-28 河海大学 Composite silt solidified material
CN100343193C (en) * 1998-04-15 2007-10-17 公路建筑国际(巴巴多斯岛)有限公司 Chemical agent for improving engineering properties of soil
CN100373010C (en) * 2005-03-07 2008-03-05 中国水利水电科学研究院 Canal system earth solidification agent and its production method
CN101215141B (en) * 2008-01-02 2010-06-16 邓亚光 Soft soil curing agent
CN102557536A (en) * 2011-12-08 2012-07-11 东南大学 Curing agent for littoral-facy soft soil
CN102617083A (en) * 2012-04-16 2012-08-01 中国海洋大学 Curing agent and preparing method and application for curing soil polluted by petroleum thereof
CN103415484A (en) * 2011-03-28 2013-11-27 花王株式会社 Method for producing cured article from hydraulic composition
CN104918899A (en) * 2013-01-15 2015-09-16 电气化学工业株式会社 High strength cement admixture and manufacturing method for concrete article
CN106566556A (en) * 2015-11-06 2017-04-19 李江波 Preparation and use method for soil curing agent
CN106746978A (en) * 2016-11-28 2017-05-31 王寿光 A kind of special cement processing method of hardening soil and silt soil
CN111704384A (en) * 2020-06-23 2020-09-25 宁波夯涌科技环保有限公司 Liquid stabilizer for engineering building muck and mud solidified soil and use method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1004547B (en) * 1988-01-19 1989-06-21 浙江工学院 Process for manufacturing clay brick by non-sintering

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100343193C (en) * 1998-04-15 2007-10-17 公路建筑国际(巴巴多斯岛)有限公司 Chemical agent for improving engineering properties of soil
CN1067663C (en) * 1998-06-12 2001-06-27 武汉水利电力大学 Soil solidifying agent
CN1301929C (en) * 2003-05-07 2007-02-28 河海大学 Composite silt solidified material
CN100373010C (en) * 2005-03-07 2008-03-05 中国水利水电科学研究院 Canal system earth solidification agent and its production method
CN101215141B (en) * 2008-01-02 2010-06-16 邓亚光 Soft soil curing agent
US9011596B2 (en) 2011-03-28 2015-04-21 Kao Corporation Method for producing cured article from hydraulic composition
CN103415484A (en) * 2011-03-28 2013-11-27 花王株式会社 Method for producing cured article from hydraulic composition
CN103415484B (en) * 2011-03-28 2017-05-03 花王株式会社 Method for producing cured article from hydraulic composition
CN102557536A (en) * 2011-12-08 2012-07-11 东南大学 Curing agent for littoral-facy soft soil
CN102617083A (en) * 2012-04-16 2012-08-01 中国海洋大学 Curing agent and preparing method and application for curing soil polluted by petroleum thereof
CN104918899A (en) * 2013-01-15 2015-09-16 电气化学工业株式会社 High strength cement admixture and manufacturing method for concrete article
CN106566556A (en) * 2015-11-06 2017-04-19 李江波 Preparation and use method for soil curing agent
CN106746978A (en) * 2016-11-28 2017-05-31 王寿光 A kind of special cement processing method of hardening soil and silt soil
CN111704384A (en) * 2020-06-23 2020-09-25 宁波夯涌科技环保有限公司 Liquid stabilizer for engineering building muck and mud solidified soil and use method thereof
CN111704384B (en) * 2020-06-23 2021-03-16 宁波夯涌科技环保有限公司 Liquid stabilizer for engineering building muck and mud solidified soil and use method thereof
CN111704384B8 (en) * 2020-06-23 2021-04-16 宁波夯涌环保科技有限公司 Liquid stabilizer for engineering building muck and mud solidified soil and use method thereof

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