CN1125200A - Special purpose cement for low alkali glass fiber reinforced concrete and clinker production technology - Google Patents

Special purpose cement for low alkali glass fiber reinforced concrete and clinker production technology Download PDF

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Publication number
CN1125200A
CN1125200A CN 94119495 CN94119495A CN1125200A CN 1125200 A CN1125200 A CN 1125200A CN 94119495 CN94119495 CN 94119495 CN 94119495 A CN94119495 A CN 94119495A CN 1125200 A CN1125200 A CN 1125200A
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CN
China
Prior art keywords
grog
cement
gypsum
raw material
clinker
Prior art date
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Application number
CN 94119495
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Chinese (zh)
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CN1045761C (en
Inventor
苏慕珍
李绍政
卢保山
王燕谋
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China Building Materials Academy CBMA
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China Building Materials Academy CBMA
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Priority to CN94119495A priority Critical patent/CN1045761C/en
Publication of CN1125200A publication Critical patent/CN1125200A/en
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Publication of CN1045761C publication Critical patent/CN1045761C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • C04B7/00—Hydraulic cements
    • C04B7/32—Aluminous cements
    • C04B7/323—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • 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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • C04B28/06—Aluminous cements
    • C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • 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
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • C04B2111/1025—Alkali-free or very low alkali-content materials

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

Abstract

The present invention relates to a low-alkali cement. Its formula includes 40-50% of improved sulpho-aluminate cement clinker, 5-20% of gypsum and 20-45% of admixture, in which the aluminium-sulfur ratio of the clinker is greater than 3.82, and its ingredients are 5-9% of SiO2, 28-40% of Al2O3, 2-4% of Fe2O3, 39-45% of CaO, 7-11% of SO3 and 1-5% of other material. The calcining temp. for production of clinker is 1300-1400 deg.C and the controlled clinker liter wieght is 750 plus or minus 100g/liter. When the invented product is used for making glass fibre-reinforced concrete product, it features non-shrink, small free-expansion, short setting time, free from after expansion and low alkali, and when the invented product is used for making GRC product, the retention rate of glass fibre strength can be stabilized to 80-90%, and its service life can be prolonged.

Description

Special purpose cement for low alkali glass fiber reinforced concrete and clinker production technology thereof
The present invention relates to a kind of cement, particularly a kind of with C 4A 3S is that essential mineral is formed, the low alkali cement of aquation liquid phase (solid-liquid=1/10 time with) pH value 1 hour＜10.5.
Traditional portland is with C 3S is the high alkalinity cement that essential mineral is formed, and forms a large amount of Ca (OH) during its aquation 2Crystal, the pH value that makes the aquation liquid phase is up to more than 13, and Ca (OH) 2Extremely strong to the glass fibre corrosive nature, therefore, when silicate cement and the compound production GRC of glass (glass fiber reinforced cement) goods, only 3～5 years its life-span, poor durability.My institute had developed a kind of I type low-alkalinity sulphoaluminate cement on the basis of aluminosulfate cement in 1980, and formulated standard ZBQ11003-86 in 1986, its corrodibility to glass is little, the retention rate of fibre strength is 70～80%, but find in actual use owing to have a large amount of anhydrite (50～60%) in the cement, the GRC goods are ftractureed because of late expansion, influenced the life-span of GRC goods.
The objective of the invention is to develop a kind of low alkali cement and clinker production technology thereof, make it little to glass corrodibility, use back free expansion little, stationary phase is short, and the no later stage expands.
The present invention improves original sulphoaluminate cement clinker, makes the aluminium-sulfur ratio Al of grog 2O 3/ SO 3From＜3.82 become＞3.82, thereby produce Ca (OH) when making aquation 2C 2The S mineral partly become C 2The AS mineral reduce the Ca (OH) that produces in the hydration process 2Amount, substitute most of anhydrite with adulterants such as Wingdale or coal gangues during preparation cement, eliminate the late expansion of GRC goods, if with phosphogypsum substitute remaining part anhydrite then the present invention can be used as soil improvement agent, regulate the pH value of soil, make swampland after improvement, can plant flowers and plants and plant.Grog Chemical Composition of the present invention is:
SiO 2???????6～9％
Al 2O 3????28～42％
Fe 2O 3????2～4％
CaO????????38～43％
SO 3???????7～11％
Other is 1～5% years old
The proportioning raw materials of grog of the present invention is:
Wingdale 40～53%
Alumina 30～40%
Gypsum 15～20%
The CaO of Wingdale＞50% wherein, the Al of alumina 2O 3＞55%, SiO 2＜30%, described gypsum is anhydrite or dihydrate gypsum, wherein the SO of anhydrite 3＞48%, the SO of dihydrate gypsum 3＞38%.Clinker production technology of the present invention is: Wingdale, alumina, gypsum is broken respectively, and then by the ratio of components batching, and common grinding is made raw material, raw material major control CaCO 3Titration value, fluctuation range are ± 0.5%, SO 3Fluctuation range is ± 0.5%, raw material fineness 0.08mm square hole sieve tails over＜and 8%, prepare qualified raw material and go into the calcined by rotary kiln ripe material, firing temperature is 1300～1400 ℃, control grog SO 3, fluctuation range is ± 0.5%, control grog liter heavily is 750 ± 100 grams per liters.The calorific value of bunker coal during production＞5000 kilocalorie/kilograms, ash＜20%, fugitive constituent＞20%.
Prescription is when utilizing above-mentioned grog to produce cement:
Grog 40～50%
Gypsum 5～20%
Adulterant 20～45%
Gypsum wherein can be anhydrite or dihydrate gypsum or chemical gypsum (phosphogypsum etc.), the SO of anhydrite 3＞48%, the SO of dihydrate gypsum or chemical gypsum 3＞38%.Above-mentioned adulterant can be Wingdale or flyash or coal gangue, the CaO of Wingdale＞51% wherein, and coal gangue is after the spontaneous combustion, its Al 2O 3＞30%, if adulterant with Wingdale then volume be 30～45%, if then be 20～30%, if then be 20～30% with coal gangue with flyash.
Adopt grog: anhydrite: Wingdale=preparation the present invention in 45: 20: 35, more as shown in table 1 with I type low-alkalinity sulphoaluminate cement Chemical Composition then, their physical and mechanical property is more as shown in table 2.
Table 1:
Cement type Cement mixing ratio Cement pH value (1h) Chemical ingredients
Grog Anhydrite Wingdale Loss on ignition SiO 2 Al 2O 3 Fe 2O 3 ?TiO 2 ???CaO ????MgO ?????SO 3 ?????∑
I type low-alkalinity sulphoaluminate cement ????40 ????60 ????10.44 ??3.05 ??3.05 ??16.15 ????0.9 ???1.02 ????38.71 ???1.86 ????34.14 ????98.88
Low alkali GRC cement ????45 ????20 ????35 ????10.32 ??12.69 ??3.43 ??21.45 ????1.35 ???0.72 ????43.2 ???1.14 ????15.47 ????99.45
Table 2:
Cement type Time of coagulation Free expansion % (ash/sand=1/0.5) Intensity MPa (ash/sand=1/2.5)
Just Eventually ???3d ???7d ??14d ???28d Resistance to compression Anti-folding
????3d ????7d ????28d ????3d ????7d ????28d
I type low-alkalinity sulphoaluminate cement 0∶21 ?0∶46 ??0.025 ??0.047 ??0.076 ????0.2 ???34.4 ???39.6 ????45.8 ????4.0 ????4.6 ????4.6
Low alkali GRC cement 0∶25 ?0∶47 ??0.033 ??0.040 ??0.050 ???0.050 ???42.6 ???47.6 ????54.8 ????5.3 ????5.8 ????7.0
The present invention not only has the low alkalinity (pH value 1 hour＜10.5) of I type low-alkalinity sulphoaluminate cement, also has no later stage expansion, free expansion is little, advantages such as stationary phase is short, be particularly suitable for the manufacturing of GRC goods, make the strength retention ratio of glass be stabilized in 80～90%, prolonged the work-ing life of GRC goods, infer that according to the quick experiment result life-span can reach 100 years.If use phosphogypsum also can make soil improvement agent, has purposes comparatively widely when production is of the present invention.

Claims (2)

1. special purpose cement for low alkali glass fiber reinforced concrete, it is characterized in that: described cement formula is:
Grog 40～50%
Gypsum 5～20%
Adulterant 20～45%
The proportioning of described grog is:
Wingdale 40～53%
Alumina 30～40%
Gypsum 15～20%
The aluminium-sulfur ratio of described grog＞3.82, its Chemical Composition is:
SiO 2??????6～9％
Al 2O 3????28～42％
Fe 2O 3????2～4％
CaO????????38～43％
SO 3???????7～11％
Other is 1～5% years old
2. a method of producing the grog of the described cement of claim 1 is characterized in that: with the fragmentation respectively of Wingdale, alumina, gypsum, press proportioning weigh batching respectively again, and grinding is made raw material jointly, wherein raw material major control CaCO 3Fluctuation range is ± O.5%, and SO 3Fluctuation range is ± 0.5%, raw material fineness 0.08%mm square hole sieve tails over＜and 8%, prepare qualified raw material and go into the calcined by rotary kiln ripe material, its firing temperature is 1300～1400 ℃, control grog SO 3Fluctuation range is ± 0.5%, and control grog liter heavily is 750 ± 100 grams per liters, the calorific value of calcinating fuel coal＞5000 kilocalorie/kilograms, ash＜20%, fugitive constituent＞20%.
CN94119495A 1994-12-22 1994-12-22 Special purpose cement for low alkali glass fiber reinforced concrete and clinker production technology Expired - Fee Related CN1045761C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN94119495A CN1045761C (en) 1994-12-22 1994-12-22 Special purpose cement for low alkali glass fiber reinforced concrete and clinker production technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN94119495A CN1045761C (en) 1994-12-22 1994-12-22 Special purpose cement for low alkali glass fiber reinforced concrete and clinker production technology

Publications (2)

Publication Number Publication Date
CN1125200A true CN1125200A (en) 1996-06-26
CN1045761C CN1045761C (en) 1999-10-20

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CN94119495A Expired - Fee Related CN1045761C (en) 1994-12-22 1994-12-22 Special purpose cement for low alkali glass fiber reinforced concrete and clinker production technology

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100351197C (en) * 2002-09-25 2007-11-28 陈智丰 Process for making quick hardening aluminosulfate cement
CN100351196C (en) * 2003-02-20 2007-11-28 陈智丰 Sulphoaluminate cement producing process with industrial waste
CN102485687A (en) * 2010-12-02 2012-06-06 上海绿特丹保温工程有限公司 Two-component packaged cement
CN114315187A (en) * 2021-12-29 2022-04-12 江西省矿产资源保障服务中心 Neutral cement containing submicron silicon-implanted silica powder, preparation method and application

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100351197C (en) * 2002-09-25 2007-11-28 陈智丰 Process for making quick hardening aluminosulfate cement
CN100351196C (en) * 2003-02-20 2007-11-28 陈智丰 Sulphoaluminate cement producing process with industrial waste
CN102485687A (en) * 2010-12-02 2012-06-06 上海绿特丹保温工程有限公司 Two-component packaged cement
CN102485687B (en) * 2010-12-02 2016-04-06 上海绿特丹保温工程有限公司 A kind of two component packaged cement
CN114315187A (en) * 2021-12-29 2022-04-12 江西省矿产资源保障服务中心 Neutral cement containing submicron silicon-implanted silica powder, preparation method and application

Also Published As

Publication number Publication date
CN1045761C (en) 1999-10-20

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