Design method of mix proportion of lc50~lc80 light weight high strength silicate ceramsite concrete

A technology of ceramsite concrete and silicate, which is applied in the field of concrete, can solve the problems that the accuracy of the amount of raw materials cannot be precisely controlled, the quality of concrete construction is difficult to guarantee, and the concrete strength is highly discrete, achieving small errors, strong applicability, and methods Simple and reasonable effect

Active Publication Date: 2021-06-22
NANJING UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of different densities of cementitious materials, the volume fraction of silica fume, fly ash and slag (V 粉煤灰 , V 硅灰 , V 矿渣 ), the remaining cement volume fraction after being replaced (V 水泥 *) and the volume fraction of cement before being replaced (V 水泥 ) have a difference, that is, V 水泥 ≠V 粉煤灰 +V 硅灰 +V 矿渣 +V 水泥 *, which also makes 1≠V 水泥 +V 水 +V 河砂 +V 陶粒 =V 粉煤灰 +V 硅灰 +V 矿渣 +V 水泥 *+V 水 +V 河砂 +V 陶粒 Therefore, the accuracy of the amount of raw materials used cannot be precisely controlled, which results in large dispersion of concrete strength and difficulty in guaranteeing the quality of concrete construction
In particular, autoclaved silicate ceramsite is a new lightweight coarse aggregate, and it is more difficult to control the performance of autoclaved silicate ceramsite concrete by using the existing mix ratio design method

Method used

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  • Design method of mix proportion of lc50~lc80 light weight high strength silicate ceramsite concrete
  • Design method of mix proportion of lc50~lc80 light weight high strength silicate ceramsite concrete
  • Design method of mix proportion of lc50~lc80 light weight high strength silicate ceramsite concrete

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Embodiment 1

[0100] A design method for the mix ratio of LC50 lightweight high-strength silicate ceramsite concrete, wherein LC50 uses autoclaved shell ceramsite with an apparent density of 1600±100kg / m 3 , the cylinder compressive strength is greater than 10MPa, and the particle size is 5-16mm. The steps are as follows:

[0101] 1) Determine the trial mix strength of autoclaved silicate ceramsite concrete

[0102] P=1.19×P=1.19×50=59.5MPa

[0103] 2) According to the trial strength of autoclaved silicate ceramsite concrete, determine the absolute volume fraction V of the composite cementitious material of autoclaved silicate ceramsite concrete per cubic meter 复合胶凝材料

[0104] V 复合胶凝材料 =0.0008P+0.0881=0.008×59.5+0.0881=0.135m 3

[0105] In the formula, V 复合胶凝材料 =V 水泥 +V 硅灰 +V 粉煤灰 +V 矿渣

[0106] V 水泥 :V 硅灰 :V 粉煤灰 :V 矿渣 =1:0.070:0.063:0.054

[0107] 3) Determine the absolute volume fraction V of each component of the composite gelling material 水泥 , V 硅灰 , V 粉煤灰 , V 矿渣

[...

Embodiment 2

[0141] A design method for the mix proportion of LC60 lightweight high-strength silicate ceramsite concrete, wherein the LC60 concrete uses shell ceramsite with an apparent density of 1700±85kg / m 3 , the cylinder compressive strength is greater than 12MPa, and the particle size is 5-16mm. The steps are as follows:

[0142] 1) Determine the trial mix strength of autoclaved silicate ceramsite concrete

[0143] P=1.15×P=1.15×60=69MPa

[0144] 2) According to the trial mix strength of autoclaved silicate ceramsite concrete, determine the absolute volume fraction V of the composite cementitious material of autoclaved silicate ceramsite concrete per cubic meter 复合胶凝材料

[0145] V 复合胶凝材料 =0.0008P+0.0881=0.008×69+0.0881=0.143m 3

[0146] In the formula, V 复合胶凝材料 =V 水泥 +V 硅灰 +V 粉煤灰 +V 矿渣

[0147] V 水泥 :V 硅灰 :V 粉煤灰 :V 矿渣 =1:0.070:0.063:0.054

[0148] 3) Determine the absolute volume fraction V of each component of the composite gelling material 水泥 , V 硅灰 , V 粉煤灰 , V 矿...

Embodiment 3

[0182] A design method for the mix proportion of LC70 lightweight high-strength shell silicate ceramsite concrete, wherein the LC70 concrete uses shell ceramsite with an apparent density of 1800±90kg / m 3 , the cylinder compressive strength is greater than 14MPa, and the particle size is 5-16mm. The steps are as follows:

[0183] 1) Determine the trial mix strength of autoclaved silicate ceramsite concrete

[0184] P=1.15×P=1.15×70=80.5MPa

[0185] 2) According to the trial strength of autoclaved silicate ceramsite concrete, determine the absolute volume fraction V of the composite cementitious material of autoclaved silicate ceramsite concrete per cubic meter 复合胶凝材料

[0186] V 复合胶凝材料 =0.0008P+0.0881=0.008×80.5+0.0881=0.153m 3

[0187] In the formula, V 复合胶凝材料 =V 水泥 +V 硅灰 +V 粉煤灰 +V 矿渣

[0188] V 水泥 :V 硅灰 :V 粉煤灰 :V 矿渣 =1:0.070:0.063:0.054

[0189] 3) Determine the absolute volume fraction V of each component of the composite gelling material 水泥 , V 硅灰 , V 粉煤灰 ...

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Abstract

The invention discloses a design method for the mix ratio of LC50-LC80 lightweight high-strength silicate ceramsite concrete, which belongs to the technical field of concrete preparation. The present invention uses the absolute volume fraction linear method to determine the absolute volume fraction of each component of silicate ceramsite concrete per cubic meter: the absolute volume fraction of composite cementitious material V 复合胶凝材料 , shell silicate ceramsite absolute volume fraction V 陶粒 , the absolute volume fraction of water V 水 and river sand absolute volume fraction V 河砂 . where V 复合胶凝材料 by V 水泥 , V 硅灰 , V 粉煤灰 and V 矿渣 composition. The invention is a simple, practical, effective and accurate design method of the mix ratio of the silicate ceramsite concrete, and has important theoretical significance and practical value for promoting the application of the silicate concrete in high-rise buildings and long-span bridges.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a design method for the mix ratio of LC50-LC80 lightweight high-strength silicate ceramsite concrete. Background technique [0002] In the national standard "Technical Regulations for Lightweight Aggregate Concrete" (JGJ51-2002), it is proposed to use the absolute volume method to prepare sand-light concrete (concrete whose coarse aggregate is ceramsite and fine aggregate is river sand). The absolute volume method is calculated according to the absolute volume of light aggregate concrete per cubic meter equal to the sum of the absolute volumes of each component material (generally cement, river sand, ceramsite, water), that is, 1=V 水泥 +V 水 +V 河砂 +V 陶粒 (where V 水泥 is the absolute volume of cement, V 水 is the absolute volume of mixing water, V 河砂 is the absolute volume of river sand, V 陶粒 is the absolute volume of ceramsite). The concept of the absolute volume method is cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/00B28B1/00B28B11/24B28B19/00B28C5/00C04B111/40
CPCB28B1/00B28B11/245B28B19/00B28C5/00C04B28/04C04B38/009C04B2111/00017C04B2111/40C04B18/146C04B18/08C04B18/141C04B18/023C04B14/06C04B2103/302C04B18/0418C04B18/12C04B22/064
Inventor 崔崇王冬云崔晓昱丁锡锋张士华李天君
Owner NANJING UNIV OF SCI & TECH
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