CN85100902B - 复合混凝土膨胀剂及其制造方法 - Google Patents

复合混凝土膨胀剂及其制造方法 Download PDF

Info

Publication number
CN85100902B
CN85100902B CN85100902A CN85100902A CN85100902B CN 85100902 B CN85100902 B CN 85100902B CN 85100902 A CN85100902 A CN 85100902A CN 85100902 A CN85100902 A CN 85100902A CN 85100902 B CN85100902 B CN 85100902B
Authority
CN
China
Prior art keywords
concrete
expanding agent
composite expanding
calcareous
mortar
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
Application number
CN85100902A
Other languages
English (en)
Other versions
CN85100902A (zh
Inventor
王延生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Building Materials Academy CBMA
Original Assignee
Academy Of Building Materials Science State Bureau Of Building Materials Industry
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Academy Of Building Materials Science State Bureau Of Building Materials Industry filed Critical Academy Of Building Materials Science State Bureau Of Building Materials Industry
Priority to CN85100902A priority Critical patent/CN85100902B/zh
Publication of CN85100902A publication Critical patent/CN85100902A/zh
Publication of CN85100902B publication Critical patent/CN85100902B/zh
Expired legal-status Critical Current

Links

Landscapes

  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

本发明系水泥、混凝土复合膨胀剂,在制备混凝土和砂浆时,掺加6~12%,可制备补偿收缩混凝土或砂浆;增大掺加量,可制备自应力混凝土或砂浆。膨胀熟料的适宜矿物组成为C↓[3]S50~70%(按重量百分比计,以下同),净CaO25~60%,C↓[4]AF1~5%,C↓[3]A2~8%,在1400℃~1600℃烧成。本发明是在膨胀熟料中加入15%以下的天然明矾石和10%以下的二水行膏粉磨而成的。

Description

复合混凝土膨胀剂及其制造方法
本发明是一种复合型混凝土膨胀剂。
与本发明最相近的混凝土膨胀剂是用石灰质原料,粘土质原料和石膏按一定比例配制、煅烧、粉磨而成。如日本昭53-31170专利揭示膨胀水泥熟料组成物的制法硅率1.0~4.0,铁率0.5~4.0,熟料中净CaO为30~80%(以重量百分比计,以下同),结晶粒径超过15μ,在煅烧前加入10~20%石膏。以上技术存在的问题是:a.因生料中含有石膏、煅烧时回转窑易结圈,烧成工艺难以掌握。b.此种膨胀剂制成的混凝土和砂浆,密实度较差,抗渗性能和后期强度不佳。
本发明的任务是针对现有技术的不足之处,制成一种新的复合膨胀剂。
本发明是利用CaO水化时的体积膨胀及明矾石〔K2SO4·Al2(SO43·4Al(OH)3〕与Ca(OH)2,CaSO4作用形成钙矾石的膨胀作用,二者相互复合产生的效果。由于CaO的早期膨胀,水泥石的结构疏松,使后期强度有降低的趋势,而明矾石形成钙矾石的膨胀是通过液相进行的,它可以填塞CaO膨胀带来的孔隙,从而使水泥石结构密实,提高其后期强度及抗渗、抗裂性能。
本发明是用石灰质原料,粘土质原料及铁质原料按比例配成生料在1400℃~1600℃的温度下煅烧而成的。其生料配比:硅率为2~5,铁率为1~4,石灰饱和系数为1~3.5。
烧成的钙质膨胀熟料,其矿物组成为硅酸三钙C3S50~70%(以重量百分比计,以下同),净CaO25~60%,铁铝酸四钙1~5%,铝酸三钙2~8%,CaO结晶尺寸15μ~50μ(净CaO为熟料中的全部CaO和SiO2、Al2O3、Fe2O3化合后剩余的量)。
在钙质膨胀熟料中加15%以下的天然明矾石和10%以下的二水石膏(也可用无水石膏代替二水石膏)共同粉磨到比表面积为2200±700cm2/g,即可制成复合膨胀剂。
配制混凝土和砂浆时,在普通水泥中掺入本发明的复合膨胀剂6~12%,可制成收缩补偿混凝土和砂浆。增大加入量可制备自应力混凝土。与膨胀水泥相比,膨胀剂的用量少,使用灵活方便,节省运费,便于贮存。而复合型膨胀剂与目前最相近的膨胀剂比较,优点更为突出,这表现在(1)由于生料中不加石膏,烧成时,避免了窑内结圈现象;(2)提高了水泥石及混凝土的密实性,抗渗性和后期强度;(3)利用10~25%的未煅烧材料,即能节省10~25%的水泥熟料,节省能源,降低了成本;(4)与硫铝酸钙膨胀剂相比,它的原料来源广、成本低。
实施本发明,取得的良好效果,可参考下面实施例。
实例,以石灰石和粘土配制成生料,在1480℃煅烧,熟料的净CaO结晶含量为33%,CaO结晶尺寸15~40μ,熟料矿物组成如表1。
表1
净CaO结晶 C3S C4AF C3A
数量% 尺寸μ
33.0 15~40 57 3.5 5.5
将此熟料按表3的比例,同明矾石和二水石膏共同粉磨至比表面积2358cm2/g,制成混凝土复合膨胀剂。
表2 原料化学成分
名称 结晶水 loss SiO2 Al2O3 Fe2O3 TiO2
明矾石 8.28 / 43.27 21.30 1.93 0.51
二水石膏 / 20.60 5.65 0.95 0.38 /
续表2
CaO MgO SO2 K2O Na2O 合计
0.54 0.19 18.69 4.88 0.67 11.26
31.12 3.04 38.26 / / 100.00
表3 复合膨胀剂组成(以重量百分比计)
钙质膨胀 熟料(%) 天然明矾 石(%) 二水石膏 (%) 比重 比表面积 (cm2/g)
88 7 5 3.07 2358
以90%的普通水泥加入10%的本发明复合膨胀剂,制备砂浆和混凝土,进行膨胀和强度试验,采用3×3×25cm限制膨胀模型作砂浆自应力试验,根据σ=μEg·εr计算自应力值(JC219-79)。采用不予约束的强度,试模尺寸4×4×16cm(砂浆)和10×10×10cm(混凝土)。砂浆试验采用20±2℃水中养护,混凝土采用雾室养护。试验结果见表4。
试验表明,掺入本发明制成的砂浆和混凝土具有良好的后期强度,1∶2砂浆可导入4~16kg/cm2自应力值,使砂浆与混凝土处于受压状态,提高其抗裂、防渗能力。
表4

Claims (6)

1、一种掺加到混凝土和水泥砂浆中的复合膨胀剂,其特征是在钙质膨胀熟料中加入15%以下的天然明矾石和10%以下的二水石膏,余量为钙质膨胀熟料,(以上为重量百分比)。
2、如权利要求1所说的复合膨胀剂,其特征是钙质膨胀熟料的矿物组成:硅酸三钙C3S57%,净氧化钙CaO33%,铁铝酸四钙C4AF3.5%,铝酸三钙C3A5.5%(以上为重量百分比)。
3、如权利要求1中所说的复合膨胀剂,其特征在于组分中的二水石膏可用无水石膏代替。
4、一种掺加到混凝土和水泥砂浆中的复合膨胀剂制造方法,其特征在于钙质膨胀熟料的烧成温度为1400℃~1600℃。
5、如权利要求4所说的复合膨胀剂的制造方法,其特征在于共同粉磨到比表面积为2200±700cm2/g。
6、上述复合膨胀剂的用途,其特征在于在普通水泥中掺加本发明的复合膨胀剂6~12%,可制成收缩补偿混凝土和砂浆。
CN85100902A 1985-04-01 1985-04-01 复合混凝土膨胀剂及其制造方法 Expired CN85100902B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN85100902A CN85100902B (zh) 1985-04-01 1985-04-01 复合混凝土膨胀剂及其制造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN85100902A CN85100902B (zh) 1985-04-01 1985-04-01 复合混凝土膨胀剂及其制造方法

Publications (2)

Publication Number Publication Date
CN85100902A CN85100902A (zh) 1986-08-06
CN85100902B true CN85100902B (zh) 1987-12-16

Family

ID=4791514

Family Applications (1)

Application Number Title Priority Date Filing Date
CN85100902A Expired CN85100902B (zh) 1985-04-01 1985-04-01 复合混凝土膨胀剂及其制造方法

Country Status (1)

Country Link
CN (1) CN85100902B (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100398478C (zh) * 2006-08-24 2008-07-02 章永泰 高钙离子水泥

Also Published As

Publication number Publication date
CN85100902A (zh) 1986-08-06

Similar Documents

Publication Publication Date Title
KR101917017B1 (ko) 급결 및 급경, 고 벨라이트 설포알루미네이트 시멘트 클링커, 이의 응용 및 이의 제조방법
CA1129444A (en) Portland cement fly ash aggregate concretes
US4350533A (en) High early strength cement
CA1320511C (en) Cementitious composition
CA2481273A1 (en) Rapid setting cementitious composition
Collepardi et al. The influence of pozzolanic materials on the mechanical stability of aluminous cement
CN110156423A (zh) 一种半水磷石膏石膏基相变储能自流平砂浆的制备方法
Yan et al. Microstructure and properties of the binder of fly ash-fluorogypsum-Portland cement
US3857714A (en) High calcium sulfate expansive clinker
US5096497A (en) Cement composition
EP0286396B1 (en) Cementitious compositions
GB2607658A (en) Method for preparing calcium sulphosilicate-dicalcium silicate-calcium sulphoaluminate system from calcium carbide slag and method for improving late-stage
US4011092A (en) Stannous sulfate and gypsum mixture as a retarder in grinding portland cement and blended hydraulic cement for improving the quality of the cement, mortar and concrete
GB2219997A (en) Heat-curing cement composition, method of hardening same, and hardened body formed therefrom
CN110218068A (zh) 地面用半水磷石膏水泥基相变储能自流平砂浆的制备方法
JPH066499B2 (ja) セメント用急結剤
US5667581A (en) Quick-hardening hydraulic bonding agent
Odler et al. Investigations on the relationship between porosity structure and strength of hydrated portland cement pastes III. Effect of clinker composition and gypsum addition
WO2021164798A1 (en) Blended cement
GB2159512A (en) Cement compositions for stowing cavities
US3942994A (en) Early strength cements
CN1092747A (zh) 高效混凝土膨胀剂及其制造方法
US6447597B1 (en) Hydrated calcium aluminate based expansive admixture
CN85100902B (zh) 复合混凝土膨胀剂及其制造方法
JPH0149657B2 (zh)

Legal Events

Date Code Title Description
SE01 Entry into force of request for substantive examination
PB01 Publication
C06 Publication
C13 Decision
GR02 Examined patent application
C14 Grant of patent or utility model
GR01 Patent grant
C53 Correction of patent for invention or patent application
CB04 Change of attorney information

Agency after: Patent Agency of China Building Materials Academy

Agency before: Patent Agent Room, Academy of Building Material Sciences, State Bureau of Building Materials Industry

CP01 Change in the name or title of a patent holder

Patentee after: China Building Material Science Institute

Patentee before: Research Inst. of Constructional Material, Bureau of National Constructional Mat

COR Change of bibliographic data

Free format text: CORRECT: PATENTEE; FROM: NATIONAL BUILDING MATERIALS INDUSTRY BUREAU BUILDING MATERIALS INSTITUTE OF SCIENCE AND TECHNOLOGY TO: CHINA BUILDING MATERIALS ACADEMY; AGENCY; FROM: ROOM #, ZHUANLIDAILI, JIANZHUCAILIAOKEXUEYANJIU YARD, GUOJIAJIANZHUCAILIAOGONGYE BUREAU TO: THE PATENT AGENCY OF THE SCIENTIFIC RESEARCH INSTITUE OF THE CHINESE BUILDING MATERIALS(11030)

C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee