机制砂掺率对塑性混凝土力学性能的影响
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摘要
通过设置2种情况(是否添加附加水)、5种机制砂掺率(0%、20%、50%、70%、100%),探索机制砂掺率对塑性混凝土力学性能和拌合物工作性能的影响。结果表明:在不添加附加水的条件下,机制砂掺率仅对塑性混凝土拌合物的工作性能产生影响,对其力学性能及应力应变曲线影响较小;在添加附加水的情况下,根据机制砂的泥粉含量可确定达到普通塑性混凝土相同塌落度的附加水用量,且加入附加水明显影响塑性混凝土的力学性能,其弹性模量及峰值应力均有不同程度的下降,而应力应变曲线则随机制砂掺率不同在加卸载段均有不同的变化。
By setting up two cases(adding additional water or not) and five kinds of ratios of added machine-made sand(0%, 20%, 50%, 70% and 100%), we explored the influence of the rate of added machine-made sand to the mechanical properties of concrete and the work ability of the mixture. The results show that under the condition of no additional water, the ratio of added machine-made sand only affects the performance of the plastic concrete mixture and has little influence to the mechanical properties and stress-strain curves. Under the condition of adding additional water, the amount of additional water to be the same collapsed slump of ordinary plastic concrete can be determined by the clay content of machine-made sand. And the additional water significantly affects the mechanical properties of plastic concrete, the elastic modulus and peak stress are significantly decreased and the stress-strain relationship can be changed by the different ratios of added machine-made sand during the loading and unloading period.
By setting up two cases(adding additional water or not) and five kinds of ratios of added machine-made sand(0%, 20%, 50%, 70% and 100%), we explored the influence of the rate of added machine-made sand to the mechanical properties of concrete and the work ability of the mixture. The results show that under the condition of no additional water, the ratio of added machine-made sand only affects the performance of the plastic concrete mixture and has little influence to the mechanical properties and stress-strain curves. Under the condition of adding additional water, the amount of additional water to be the same collapsed slump of ordinary plastic concrete can be determined by the clay content of machine-made sand. And the additional water significantly affects the mechanical properties of plastic concrete, the elastic modulus and peak stress are significantly decreased and the stress-strain relationship can be changed by the different ratios of added machine-made sand during the loading and unloading period.
引文
[1] 宋博,何江涛,刘长礼.不同荷载作用下塑性混凝土渗透性试验研究[J].南水北调与水利科技,2015,13(2):309-313.
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[3] 宋帅奇,高丹盈,胡良明,等.塑性混凝土强度和尺寸效应的试验研究[J].水利水电科技进展,2010,30(3):32-36.
[4] 王四巍,李小超,李杨,等.膨润土及水泥用量对塑性混凝土变形及破坏特征的影响[J].硅酸盐学报,2014,42(1):33-37.
[5] 李青云,张建红,包承纲.风化花岗岩开挖弃料配制三峡二期围堰防渗墙材料[J].水利学报,2004,35(11):114-118.
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[11] 刘战鳌,周明凯,姚楚康.细粉对机制砂亚甲蓝值的影响研究[J].混凝土,2013(11):112-115,118.
[12] 刘战鳌,周明凯,姚楚康.机制砂中细粉的危害性及评价研究[J].建筑材料学报,2015,18(1):150-155.
[13] 蔡基伟.石粉对机制砂混凝土性能的影响及机理研究[D].武汉:武汉理工大学,2006:67-71.
[14] 李北星,王稷良,柯国炬,等.机制砂亚甲蓝值对混凝土性能的影响研究[J].水利水电技术,2009,40(4):30-32,35.
[15] 张涛,潘家锋,万岳,等.膨润土改善塑性混凝土性能的作用机理[J].人民黄河,2007,29(11):78-79,81.
[16] 何盛东,刘立新,王华,等.不同替代率下机制砂混凝土抗压强度的试验研究[J].混凝土,2010(10):109-111.
[17] 王四巍,于怀昌,高丹盈,等.塑性混凝土弹性模量室内试验研究[J].水文地质工程地质,2011,38(3):73-76.
[18] 李清富,张鹏,张保雷.塑性混凝土弹性模量的试验研究[J].水力发电,2005,31(3):30-32.
[19] 宋力,刘璐璐,高玉琴.塑性混凝土相对弹性变形特性试验研究[J].长江科学院院报,2016,33(3):147-150.
[20] 宋力,常芳芳.塑性混凝土应力应变特性的试验研究[J].南水北调与水利科技,2014,12(2):67-70,132.
[2] 赵中华,马耀辉.塑性混凝土配合比设计[J].黑龙江水专学报,2009,36(2):53-56.
[3] 宋帅奇,高丹盈,胡良明,等.塑性混凝土强度和尺寸效应的试验研究[J].水利水电科技进展,2010,30(3):32-36.
[4] 王四巍,李小超,李杨,等.膨润土及水泥用量对塑性混凝土变形及破坏特征的影响[J].硅酸盐学报,2014,42(1):33-37.
[5] 李青云,张建红,包承纲.风化花岗岩开挖弃料配制三峡二期围堰防渗墙材料[J].水利学报,2004,35(11):114-118.
[6] 杨文烈,邸春福.机制砂的生产及在混凝土中的应用[J].混凝土,2008(6):113-117.
[7] 朱俊利,郎学刚,贾希娥.机制砂生产现状与发展[J].矿冶,2001,10(4):38-42.
[8] 晏海霞,姜磊.膨润土在塑性混凝土中的作用机理及应用现状[J].四川建材,2010,36(3):19-20.
[9] 干方群,杭小帅,马毅杰,等.天然膨润土的矿物特性及其磷吸附性能研究[J].土壤,2012,44(6):996-1000.
[10] 王四巍.单轴和三轴应力下塑性混凝土性能研究[D].郑州:郑州大学,2010:23-32.
[11] 刘战鳌,周明凯,姚楚康.细粉对机制砂亚甲蓝值的影响研究[J].混凝土,2013(11):112-115,118.
[12] 刘战鳌,周明凯,姚楚康.机制砂中细粉的危害性及评价研究[J].建筑材料学报,2015,18(1):150-155.
[13] 蔡基伟.石粉对机制砂混凝土性能的影响及机理研究[D].武汉:武汉理工大学,2006:67-71.
[14] 李北星,王稷良,柯国炬,等.机制砂亚甲蓝值对混凝土性能的影响研究[J].水利水电技术,2009,40(4):30-32,35.
[15] 张涛,潘家锋,万岳,等.膨润土改善塑性混凝土性能的作用机理[J].人民黄河,2007,29(11):78-79,81.
[16] 何盛东,刘立新,王华,等.不同替代率下机制砂混凝土抗压强度的试验研究[J].混凝土,2010(10):109-111.
[17] 王四巍,于怀昌,高丹盈,等.塑性混凝土弹性模量室内试验研究[J].水文地质工程地质,2011,38(3):73-76.
[18] 李清富,张鹏,张保雷.塑性混凝土弹性模量的试验研究[J].水力发电,2005,31(3):30-32.
[19] 宋力,刘璐璐,高玉琴.塑性混凝土相对弹性变形特性试验研究[J].长江科学院院报,2016,33(3):147-150.
[20] 宋力,常芳芳.塑性混凝土应力应变特性的试验研究[J].南水北调与水利科技,2014,12(2):67-70,132.