CN1541974A - 抗冲耐磨混凝土 - Google Patents

抗冲耐磨混凝土 Download PDF

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CN1541974A
CN1541974A CNA2003101113282A CN200310111328A CN1541974A CN 1541974 A CN1541974 A CN 1541974A CN A2003101113282 A CNA2003101113282 A CN A2003101113282A CN 200310111328 A CN200310111328 A CN 200310111328A CN 1541974 A CN1541974 A CN 1541974A
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cement
concrete
silica flour
resisting
consumption
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CN1243688C (zh
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廖碧娥
白福来
梁波
张清江
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Wuhan University WHU
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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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • 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
    • C04B28/04—Portland cements

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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)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

本发明提供了一种抗冲耐磨混凝土，它主要由水泥、骨料、外掺料用水拌和而成，其中水泥用标号为≥525号的硅酸盐水泥，水泥用量为400～500kg/m3，骨料选用压碎指标低于2.4％(水工混凝土试验规程)或磨耗度低于2.2％(采用双筒磨耗机试验法)的岩石，外掺料为磨耗度低于2.2％，处理硅粉胶的用量为水泥的12％～30％(质量百分比)，且处理硅粉胶中硅粉的质量百分比应占水泥和硅粉总量的5％～12％，混凝土的砂率为30％～40％(质量百分比)，用水量在60～90kg/m3之间。这种混凝土具有很强的抗冲磨破坏的能力。

Description

抗冲耐磨混凝土
                    技术领域
本发明涉及一种主要用于水工泄水建筑物的抗冲耐磨混凝土，属水工混凝土类。
                    背景技术
众所周知，一般混凝土的强度主要取决于所用水泥的标号和混凝土的水灰比。但在挾沙、石水流、泄水建筑物中，混凝土以推移质冲砸破坏或悬移质微切削破坏为主，而混凝土的抗冲磨强度与其抗压、抗拉强度没有明显关系，因此抗冲耐磨混凝土的组成材料及各材料的含量与一般混凝土有很大区别。
                    发明内容
本发明提供了一种抗冲耐磨混凝土，它主要由水泥、粗细骨料、外掺料用水拌和而成，其中水泥用标号为≥525号的硅酸盐水泥，水泥用量为400～500kg/m3；粗细骨料根据挾沙水流情况来确定，若以推移质冲砸破坏为主，应选用压碎指标低于2.4％(水工混凝土试验规程)，若以悬移质微切削破坏为主，应选用磨耗度低于2.2％(采用双筒磨耗机试验法)的岩石；外掺料为处理硅粉胶，处理硅粉胶的用量为水泥的12％～30％(质量百分比)，且处理硅粉胶中硅粉的质量百分比占水泥和硅粉总量的5％～12％，混凝土的砂率为30％～40％(质量百分比)，用水量在60～90kg/m3之间。
这种抗冲耐磨混凝土加入了外掺料处理硅粉胶，且对其组成材料及各材料的用量进行了严格的选择与控制，经试验及实际工程检验后发现它比普通混凝土承受挾沙、石水流作用所产生的冲磨破坏的能力可提高几倍到十几倍。
                  具体实施方式
因本发明提供的抗冲耐磨混凝土一般在一项水利工程中的用量都相当大，所以所用材料尽量就近选取，但材料应满足要求。水泥可选用≥525号的硅酸盐水泥，骨料可通过试验检验工程当地的各种岩石，选用压碎指标低于2.4％(水工混凝土试验规程)或磨耗度低于2.2％(采用双筒磨耗机试验法)的岩石破碎而成，若工程以抗推移质破坏为主选用压碎指标低于2.4％的岩石，若工程以抗悬移质破坏为主则选用磨耗度低于2.2％的岩石，当工程当地的岩石均不满足要求时，可选用安徽马鞍山铁矿石或合适的工业材料铸石，破碎为粗、细骨料。外掺料用武汉大学研制的处理硅粉胶(专利申请号：01166012.1)，处理硅粉胶的用量为水泥的12％～30％(质量百分比)，处理硅粉胶的用量由硅粉掺量决定，硅粉的质量百分比一般应占水泥和硅粉总量的5％～12％，在5％～12％中选择各种整数比配制砂浆试件进行抗折、抗压强度试验，选取强度最高时的硅粉掺量，并根据处理硅粉胶的成份换算成处理硅粉胶的掺量，水泥用量在400～500kg/m3中选择各种整数值试拌混凝土，通过冲磨强度试验选用冲磨强度最高时的水泥用量。用水量在60～90kg/m3之间选择各种整数值试拌混凝土，以达到施工要求的工作度为准，施工要求的工作度一般为15～25秒。混凝土的砂率为30％～40％(质量百分比)，最佳砂率选用方法与普通混凝土相同。
表1为抗冲耐磨与普通混凝土不同配合比及其抗冲磨强度试验结果对比表
 抗冲耐磨混凝土材料名称 525#硅酸盐水泥   处理硅粉胶 水   细骨料(马鞍山铁矿石)         粗骨料(马鞍山铁矿石) 试验室抗冲磨强度(h/cm小时/厘米) 实际工程平均一年磨损深度(厘米)
5～20mm 20～40mm
用料量(kg/m3)     400     75     70     1179    1004     1004   15.8   0.15
    450     80     65     1157    985     985   15.7     /
    500     90     60     1121    954     954   15.2     /
   普通混凝土材料名称 525硅酸盐水泥     /     水   细骨料(当地河砂)   粗骨料(当地卵石) 抗冲磨强度μ/cm 实际工程平均一年磨损深度(厘米)
5～20mm 20～40mm
   用料量(kg/m3) 400 / 140 719 612 612 4.63 2.0
注：骨料用量为饱和面干状态时的重量
表2为表1使用骨料的压碎指标与磨耗度试验结果表
    骨料名称     压碎值指标(％)     磨耗度(％)
    安徽马鞍山铁矿石     1.741     1.786
    新疆三屯河卵石     11.909     6.213

Claims (2)

1、一种抗冲耐磨混凝土，主要由水泥、骨料、外掺料用水拌和而成，其特征在于：水泥用标号为≥525号硅酸盐水泥，水泥用量为400～500kg/m3，骨料选用压碎指标低于2.4％(水工混凝土试验规程)或磨耗度低于2.2％(采用双筒磨耗机试验法)的岩石，外掺料为处理硅粉胶，处理硅粉胶的用量为水泥的12％～30％(质量百分比)，且混凝土的砂率为30％～40％(质量百分比)，用水量在60～90kg/m3之间。
2、根据权利要求1所述的抗冲耐磨混凝土，其特征在于：处理硅粉胶中硅粉的质量百分比占水泥和硅粉总量的5％～12％。
CN 200310111328 2003-11-04 2003-11-04 抗冲耐磨混凝土 Expired - Fee Related CN1243688C (zh)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103043955A (zh) * 2012-12-06 2013-04-17 中国长江三峡集团公司 一种铁矿石骨料高强抗冲磨混凝土配方
CN105503075A (zh) * 2015-12-21 2016-04-20 乔俊擎 一种水利工程用抗冲耐磨混凝土及其制备方法
CN107540290A (zh) * 2017-10-31 2018-01-05 河北水利电力学院 一种土木工程用抗冲耐磨混凝土及其制备方法
CN112250381A (zh) * 2020-10-12 2021-01-22 中国三峡建设管理有限公司 一种采用玄武岩开挖料作骨料的高强度高抗裂抗冲磨混凝土及其制备方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103043955A (zh) * 2012-12-06 2013-04-17 中国长江三峡集团公司 一种铁矿石骨料高强抗冲磨混凝土配方
CN105503075A (zh) * 2015-12-21 2016-04-20 乔俊擎 一种水利工程用抗冲耐磨混凝土及其制备方法
CN105503075B (zh) * 2015-12-21 2017-08-25 盐城市凯利特商品混凝土有限公司 一种水利工程用抗冲耐磨混凝土及其制备方法
CN107540290A (zh) * 2017-10-31 2018-01-05 河北水利电力学院 一种土木工程用抗冲耐磨混凝土及其制备方法
CN112250381A (zh) * 2020-10-12 2021-01-22 中国三峡建设管理有限公司 一种采用玄武岩开挖料作骨料的高强度高抗裂抗冲磨混凝土及其制备方法

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