Unlock instant, AI-driven research and patent intelligence for your innovation.

Detection method of chloride ion content in sea sand

A technology of chloride ion content and detection method, which is applied in the field of detection of chloride ion content in sea sand, can solve the problems of low measurement value, etc., and achieve the effects of fast operation, promoting full dissolution, and meeting the requirements of on-site testing.

Active Publication Date: 2017-09-05
中国国检测试控股集团海南有限公司
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through research, it is found that the current detection method of chloride ions in sea sand has defects, and its measured value is lower than the true value of chloride ions in sea sand, and excessive chloride ions in sea sand are slowly released in buildings, which leads to the above-mentioned problems in reinforced concrete

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detection method of chloride ion content in sea sand
  • Detection method of chloride ion content in sea sand
  • Detection method of chloride ion content in sea sand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Sieve the sea sand in the natural wet state, take m(1+z) gram weight of the sieve as the sea sand sample, m is the quality of the dry sea sand sample, z is the moisture content of the sea sand sample in the natural wet state .

[0024] Add deionized water to the above-mentioned sea sand sample, heat and control the temperature of the sea sand sample to 40-95°C, and then let it stand for more than 24 hours;

[0025] Filter, immerse the chloride ion selective electrode and the saturated calomel electrode in the filtrate, and the above two electrodes are connected with the potentiometer;

[0026] Read the voltage in millivolts, the electromotive force of the battery and the concentration of chloride ions in the solution to be tested conform to the Nernst law formula (1), and the molar concentration of chloride ions can be obtained according to the regression analysis formula;

[0027]

[0028] In the formula, E is the equilibrium battery potential (mV), E 0 is the sta...

example 1-5

[0039] According to the method described in the above-mentioned Example 1, the temperature of the sea sand samples was controlled at 25°C, 40°C, 60°C, 80°C and 95°C to detect the chloride ion concentration in the sea sand, and the obtained test results are shown in Table 1.

Embodiment 2

[0046] Sieve the sea sand in the natural wet state, take m(1+z) gram weight of the sieve as the sea sand sample, m is the quality of the dry sea sand sample, z is the moisture content of the sea sand sample in the natural wet state .

[0047] Add deionized water to the above-mentioned sea sand sample, then perform ultrasonic oscillation, and then let it stand for more than 24 hours;

[0048] Filter, immerse the chloride ion selective electrode and the saturated calomel electrode in the filtrate, and the above two electrodes are connected with the potentiometer;

[0049] Read the voltage in millivolts, the electromotive force of the battery and the concentration of chloride ions in the solution to be tested conform to the Nernst law formula (1), and the molar concentration of chloride ions can be obtained according to the regression analysis formula;

[0050]

[0051] In the formula, E is the equilibrium battery potential (mV), E 0 is the standard potential (mV), R is the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for detecting chloride ion content in sea sand, comprising: sieving the sea sand, and using the under-sieve as a sea sand sample; adding deionized water to the above sea sand sample, heating and / or ultrasonication at the same time Oscillate, then stand still; filter, immerse the chloride ion selective electrode and saturated calomel electrode in the filtrate, the above two electrodes are connected to the potentiometer; read the voltage in millivolts, the electromotive force of the battery and the concentration of chloride ions in the solution to be measured In line with Nernst's law, the molar concentration of chloride ions can be obtained according to the regression analysis formula; then the molar concentration of chloride ions is converted into the weight percentage of sea sand to obtain the measured value of chloride ion content. The method of the invention makes the measured value of ions more consistent with the real value of chloride ion content in sea sand, and provides reliable reference data for construction sand.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for chloride ion content in sea sand. Background technique [0002] With the development of urbanization, the freshwater placer is depleted day by day, and the amount of new river sand can no longer meet the demand for construction sand. However, my country's coastal areas are rich in sea sand resources, which can well alleviate the tension of construction sand. Compared with river sand, sea sand has the characteristics of low mud content and uniform fineness modulus, but sea sand contains high concentration of chloride salts, and the chloride ions in chloride salts have a destructive effect on concrete, thereby reducing the durability of buildings and security. my country's current GB / T 14684-2011 "Sand for Construction" and JGJ52-2006 "Standards for the Quality and Inspection Methods of Sand and Stone for Ordinary Concrete" provide normative guidance and requirements f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/60
Inventor 蒋荃孙飞龙吴帅刘顺利吴俊升陈火诚刘婷婷刘玉军赵春芝马丽萍郑雪颖邓宇
Owner 中国国检测试控股集团海南有限公司