CN1043339C - Producting wall material using high-calcium coal ash instead of cement and its production technology - Google Patents

Producting wall material using high-calcium coal ash instead of cement and its production technology Download PDF

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Publication number
CN1043339C
CN1043339C CN93105763A CN93105763A CN1043339C CN 1043339 C CN1043339 C CN 1043339C CN 93105763 A CN93105763 A CN 93105763A CN 93105763 A CN93105763 A CN 93105763A CN 1043339 C CN1043339 C CN 1043339C
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CN
China
Prior art keywords
calcium
weight
cinder
fly ass
coal ash
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.)
Expired - Fee Related
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CN93105763A
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Chinese (zh)
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CN1095363A (en
Inventor
顾麟祺
顾梦煦
张健民
陆耀东
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JIANXIN CONSTRUCTION MATERIAL FACTORY SHANGHAI NEW CONSTRUCTION MATERIAL CORP
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JIANXIN CONSTRUCTION MATERIAL FACTORY SHANGHAI NEW CONSTRUCTION MATERIAL CORP
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Priority to CN93105763A priority Critical patent/CN1043339C/en
Publication of CN1095363A publication Critical patent/CN1095363A/en
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Publication of CN1043339C publication Critical patent/CN1043339C/en
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    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The present invention uses high calcium coal ash as a raw material and is matched with industrial alkaline waste liquid containing calcium chloride to be used as an excitant for decomposing free calcium oxide so as to replace traditional cement and lime to produce various novel wall materials, such as coal ash silicate building blocks, bearing coal ash bricks and bearing coal ash hollow bricks. Each item of performance of the wall materials conforms to the standard requirement. Simultaneously, the problem of the comprehensive utilization of the waste slag of a power plant and the calcium chloride waste liquid of a chemical plant is solved. The present invention has obvious economic benefits, environmental benefits and social benefits.

Description

Utilize high-calcium coal ash instead manufacture of cement materials for wall and production technique thereof
The present invention relates to New Building Materials and preparation method thereof, specifically, the present invention utilizes method of high-calcium coal ash instead manufacture of cement novel wall material and products thereof.
From known references report, show that free calcium oxide in the gelling material when aquation, the expansion of solid volume will take place, and can cause expansion stress in the material that has solidified, the destruction that may cause material structure when serious.
Free CaO and water carry out the volumetric expansion volume of solid phase behind the hydration reaction by Theoretical Calculation, will increase as follows:
Cao H 2O Ca(OH) 2
Gram molecular weight 56 18 74
Density (g/cm 3) 3.32 1 2.23
Molecular volume (cm 3) 16.87 18 33.2
Cumulative volume 34.87 (original) (33.2 finally)
ΔV = 33.2 - 16.78 16.78 × 100 = 96.8 % 。
Aforementioned calculation result meets the empirical relationship of " volume of anhydrous material adds the volume that enters the water in the hydrated product, should equal the volume of reactant ".After the reaction of free CaO and water was described, its solid volume had increased by 96.8% really.
If directly high-calcium fly ass is added water and clay mix, cracking or collapse phenomenon all may take place in then fixed sintering-free clay brick.Therefore, utilize high-calcium fly ass to make the key problem in technology of solidifying agent, obviously be to solve the caused solid volume expansion issues of its free CaO.
Though the approach of at present more existing solutions, for example: in high-calcium fly ass, add the water of 10-15%, place after 16 hours, have in the free CaO in the high-calcium fly ass to be transformed into Ca (OH) about half 2, but, therefore, its significant disadvantages is arranged also because complex process and effect are also undesirable.
For this reason, the invention provides the alkaline industrial effluent that a kind of utilization contains calcium chloride, the activity excitant as free calcium oxide in the high-calcium fly ass is cleared up makes the free calcium oxide in the high-calcium fly ass become Ca (OH) at short notice 2, and remaining free calcium oxide has been not enough to the materials for wall of producing is caused the harm of solid volume expansible.
Above-mentioned purpose of the present invention realizes in the following manner: a kind of production technique of materials for wall, comprise the cinder of 55-65% weight (maximum particle diameter＜40mm), the high-calcium fly ass of 35-45% weight and add based on the calcium chloride of high-calcium fly ass weight 2-3% with by the water of cinder and high-calcium fly ass gross weight 15-18% and mix (mixing 2 minutes time only), pour into a mould then and vibrate (time of vibration 30-60 second, vibrational frequency 1800-2300 time/minute, amplitude 0.3-0.5mm), again 50-60 ℃ of quiet the stopping about 5 hours of vapor cure, heated up then 6 hours, and 100 ℃ of constant temperature 8 hours, after the intensification maintenance, the discharging in a hour of lowering the temperature.
It is characterized in that described calcium chloride is the alkaline waste liquor of the calcium chloride that contains 8-12% weight that produces in the chloroform production.
Advantage of the present invention is tangible, high-calcium fly ass is the waste residue in fuel-burning power plant, the calcium chloride alkaline aqueous solution is to produce the waste water that produces in the chloroform process, utilize high-calcium coal ash instead cement, utilize waste water in the chloroform production to clear up free calcium oxide in the high-calcium fly ass rapidly, production high-quality materials for wall has tangible economic benefit, environmental benefit and social benefit.
Below, will be in conjunction with specific embodiments, the present invention is described in further detail, so that advantage of the present invention is more obvious.
Embodiment: fly ash silicate building block
Table 1: the weight percentage of each component
The original state high-calcium fly ass Levigate high-calcium fly ass Ordinary fly ash Lime Gypsum Cinder Calcium chloride * Water **
Comparative Examples 1 30 13 2 55 33
Example 2 45 55 3 15.2
Example 3 45 55 3 16.2
Example 4 40 60 2.8
Example 5 40 60 2.8 15.8
*Percentage ratio by high-calcium fly ass weight; *Percentage ratio by the gross weight of high-calcium fly ass and cinder.
Embodiment: load-bearing fly ash brick
Table 2: the weight percentage of each component
Sequence number Levigate high-calcium fly ass Cinder Calcium chloride * Water **
Example 6 40 60 3 13.0
Example 7 40 60 3 12.5
*Percentage ratio by high-calcium fly ass weight; *Percentage ratio by the gross weight of high-calcium fly ass and cinder.
Embodiment: load-bearing fly ash hollow brick
Table 3: the weight percentage of each component
Sequence number Levigate high-calcium fly ass Cinder Calcium chloride * Water **
Example 8 40 60 3 11.O
Example 9 40 60 3 11.0
*Percentage ratio by high-calcium fly ass weight; *Percentage ratio by the gross weight of high-calcium fly ass and cinder.Annotate: fine-ground fly-ash fineness 0.08mm tails over 2-4%.
The operating procedure of embodiment: 2-9:
The cinder of above-mentioned prescription is added in the high-calcium fly ass, add the waste solution of calcium chloride and the water of above-mentioned prescription again, only mixed 2 minutes, the workability of compound is 5-15 second, pour into a mould then and vibrate, vibrational frequency is 1800-2300 time/minute, amplitude is 0.3-0.5mm, and time of vibration is 30-60 second, carries out vapor cure then, heated up 6 hours, in 100 ℃ 8 hours, insulation finishes, and lowers the temperature 1 hour, product detects according to the JC238-91 standard, and it the results are shown in (one) fly ash silicate building block table 4 in following table 4,5 and 6
Sequence number Starting material The test specimen outward appearance Unit weight kg/m 3 Intensity Mpa Shrinkage value mm/m Frost resistance Remarks
Steam-cured intensity one day after Manually CarbonizationBack intensity
Comparative Examples 1 Ordinary fly ash, lime, gypsum, cinder Good 1700 15.0 8.5 0.80 Qualified
Example 2 High-calcium fly ass, matchmaker's slag, calcium chloride Good 1981 27.6 Carbonization was not complete through three months in gas concentration lwevel is 60% above carbonization case 0.26 Qualified The original state high calcium ash
Example 3 High-calcium fly ass, matchmaker's slag, calcium chloride Good 1800 24.6 The original state high calcium ash
Example 4 High-calcium fly ass, cinder, calcium chloride Good 1832 22.3 The original state high calcium ash
Example 5 High-calcium fly ass, cinder, calcium chloride Good 1955 32.5 0.28 Qualified Levigate high calcium ash
JC238-91 flyash silicate lock standard Acceptable end product ≥13 ≥7.8 ≤0.75 Qualified
Salable product ≥10 ≥6.0 ≤0.90 Qualified
(2) load-bearing fly ash brick
Table 5
Sequence number Starting material The test specimen outward appearance Unit weight kg/m 3 The steam-cured Mpa of intensity one day after Remarks
Example 6 High-calcium fly ass, cinder, calcium chloride Good 1870 18.43 Attached 240 * 115 * 53mm of profile
Example 7 High-calcium fly ass, cinder, calcium chloride Good 1890 19.04 240×115×53
Standard The standard of SC238-77 flyash brick ≥7.5 ≥10.0 ≥15.0 The intensity of brick is divided into three grades in the standard
(3) load-bearing fly ash hollow brick
Table 6
Sequence number The raw material material The test specimen outward appearance Unit weight kg/m 3 The steam-cured Mpa of intensity one day after Remarks
Example 8 High-calcium fly ass, cinder, calcium chloride Good 1475 15.46
Example 9 High calcium divides coal ash, cinder, calcium chloride Good 1445 11.52
Standard JC196-75 load-bearing structural clay tile standard 7.5 10 15 20 The intensity of standard hollow heart brick is divided into level Four, Shanghai requires to work energetically 10Mpa
As can be seen from the above table, utilize high-calcium coal ash instead lime, gypsum to produce the fly ash silicate building block, load-bearing fly ash brick and the every performance of load-bearing fly ash hollow brick all meet national standard, the intensity of fly ash silicate building block, shrinkage value all are better than adopting ordinary fly ash, the flyash-Si salt building block of lime preparation.Utilize high-calcium fly ass production load-bearing fly ash brick and its performance of load-bearing fly ash hollow brick all to meet national standard.

Claims (4)

1. the production technique of a materials for wall, its feature comprises: with the high-calcium fly ass of the cinder of 55-60 weight %, 40-45 weight % and add based on the calcium chloride of high-calcium fly ass weight 2.8-3% with based on the water of cinder and high-calcium fly ass gross weight 11-18% and under agitation mixed only 2 minutes, pour into a mould then, vibration and vapor cure, conservation system is in 50-60 ℃ of quiet stopping 5 hours, heated up again 6 hours, the back cooling 1 hour that finishes of 100 ℃ of constant temperature 8 hours, maintenance, discharging.
2. the fly ash silicate building block that makes with technology as claimed in claim 1, its raw material comprise 40-45 weight % high-calcium fly ass, 55-60 weight % cinder and add based on the calcium chloride of high-calcium fly ass weight 2.8-3% with by the water of the gross weight 15-16.2% of cinder and high-calcium fly ass.
3. the load-bearing fly ash brick that makes with technology as claimed in claim 1, its raw material comprise 40 weight % high-calcium fly ass, 60 weight % cinder and add based on the calcium chloride of high-calcium fly ass weight 3% with by the water of the gross weight 12.5-13% of cinder and high-calcium fly ass.
4. the load-bearing fly ash hollow brick that makes with technology as claimed in claim 1, its raw material comprise 40 weight % high-calcium fly ass, 60 weight % cinder and add based on the calcium chloride of high-calcium fly ass weight 3% with by the water of the gross weight 11% of cinder and high-calcium fly ass.
CN93105763A 1993-05-13 1993-05-13 Producting wall material using high-calcium coal ash instead of cement and its production technology Expired - Fee Related CN1043339C (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100400453C (en) * 2006-09-27 2008-07-09 彭昊 Energy-saving environment protection brick and its production process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017179769A1 (en) * 2016-04-15 2017-10-19 울산과학기술원 Blast-furnace slag-based cementless binder with calcium chloride added
CN109622571A (en) * 2019-01-04 2019-04-16 葛洲坝武汉道路材料有限公司 A kind of road pretreatment of slag method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043117A (en) * 1989-12-16 1990-06-20 湖北省电力试验研究所 Free of calcining and steam curing flyash brick and preparation method thereof
CN1063671A (en) * 1991-02-01 1992-08-19 林永昌 Coal powder grey slag brick and production technique thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043117A (en) * 1989-12-16 1990-06-20 湖北省电力试验研究所 Free of calcining and steam curing flyash brick and preparation method thereof
CN1063671A (en) * 1991-02-01 1992-08-19 林永昌 Coal powder grey slag brick and production technique thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《硅酸盐建筑制品》第2期，1987 1987.4.22 蒋伍举，"几种简单可行和粉煤灰活化方法" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100400453C (en) * 2006-09-27 2008-07-09 彭昊 Energy-saving environment protection brick and its production process

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