Hydrochloric acid heat reaction method to measure cement contents in cement mixed soils

Hiroshi Kubo, Shinya Inazumi, Toshihiko Miura

Research output: Contribution to journalArticle

Abstract

The mixing cement with soft soil to increase their strength has been used in many construction sites and it is important that soil and cement are well mixed. In order to evaluate the mixing accuracy during construction, it may be required to measure the cement content by sampling the cement mixed soil. While there are several methods for measuring cement content, the hydrochloric acid heat reaction (HAHR) method is easiest and quickest and is relatively high in precision to measure the cement content in fresh concrete. However, to apply HAHR to the fresh soil cement, there were many questions about a test condition. This study investigated conditions to apply the HAHR method to cement mixed soil. At first, cement are mixed to the local soil samples in the ratio of 0 to 10g/100g. Initial temperatures (T0) of the mixed soil and hydrochloric acid are measured. 100 g of mixed soil is put in an insulated container. 100mL of hydrochloric acid is added, and reaction temperature (T1) is measured. Relationship of temperature rise (T1-T0) and cement content is a calibration graph. The relation is proportional. And, the temperature rises are measured about 100g of cement mixed soil of the site. Its cement content is obtained using the calibration curve. It is optimal to use 6M hydrochloric acid for this method. It is necessary to examine it with local soil and local cement to prepare a calibration curve. When the water content ratio of the soil greatly changes, it is necessary for the calibration curve to be updated. HAHR tests are done in 10 to 60 minutes after having mixed soil and cement in the case of samples containing a little water. But, in the case of containing much water, the tests are done under the specified elapsed time. As an example of the result, the cement content of soil can be determined from the rising temperature of the sample soil.

Original languageEnglish
Pages (from-to)177-183
Number of pages7
JournalInternational Journal of GEOMATE
Volume15
Issue number52
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

hydrochloric acid
Hydrochloric acid
cement
Cements
Soils
heat
soil
methodology
calibration
Calibration
Hot Temperature
method
temperature
Temperature
soil sampling
Soil cement
testing
soft soil
Water content
Containers

Keywords

  • Cement content
  • Dissolution heat
  • Hydrochloric acid
  • Soil
  • Temperature

ASJC Scopus subject areas

  • Environmental Engineering
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology
  • Soil Science

Cite this

Hydrochloric acid heat reaction method to measure cement contents in cement mixed soils. / Kubo, Hiroshi; Inazumi, Shinya; Miura, Toshihiko.

In: International Journal of GEOMATE, Vol. 15, No. 52, 01.01.2018, p. 177-183.

Research output: Contribution to journalArticle

@article{c52b14e813b141ab8a620bb9827e88b2,
title = "Hydrochloric acid heat reaction method to measure cement contents in cement mixed soils",
abstract = "The mixing cement with soft soil to increase their strength has been used in many construction sites and it is important that soil and cement are well mixed. In order to evaluate the mixing accuracy during construction, it may be required to measure the cement content by sampling the cement mixed soil. While there are several methods for measuring cement content, the hydrochloric acid heat reaction (HAHR) method is easiest and quickest and is relatively high in precision to measure the cement content in fresh concrete. However, to apply HAHR to the fresh soil cement, there were many questions about a test condition. This study investigated conditions to apply the HAHR method to cement mixed soil. At first, cement are mixed to the local soil samples in the ratio of 0 to 10g/100g. Initial temperatures (T0) of the mixed soil and hydrochloric acid are measured. 100 g of mixed soil is put in an insulated container. 100mL of hydrochloric acid is added, and reaction temperature (T1) is measured. Relationship of temperature rise (T1-T0) and cement content is a calibration graph. The relation is proportional. And, the temperature rises are measured about 100g of cement mixed soil of the site. Its cement content is obtained using the calibration curve. It is optimal to use 6M hydrochloric acid for this method. It is necessary to examine it with local soil and local cement to prepare a calibration curve. When the water content ratio of the soil greatly changes, it is necessary for the calibration curve to be updated. HAHR tests are done in 10 to 60 minutes after having mixed soil and cement in the case of samples containing a little water. But, in the case of containing much water, the tests are done under the specified elapsed time. As an example of the result, the cement content of soil can be determined from the rising temperature of the sample soil.",
keywords = "Cement content, Dissolution heat, Hydrochloric acid, Soil, Temperature",
author = "Hiroshi Kubo and Shinya Inazumi and Toshihiko Miura",
year = "2018",
month = "1",
day = "1",
doi = "10.21660/2018.52.8143",
language = "English",
volume = "15",
pages = "177--183",
journal = "International Journal of GEOMATE",
issn = "2186-2982",
publisher = "GEOMATE International Society",
number = "52",

}

TY - JOUR

T1 - Hydrochloric acid heat reaction method to measure cement contents in cement mixed soils

AU - Kubo, Hiroshi

AU - Inazumi, Shinya

AU - Miura, Toshihiko

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The mixing cement with soft soil to increase their strength has been used in many construction sites and it is important that soil and cement are well mixed. In order to evaluate the mixing accuracy during construction, it may be required to measure the cement content by sampling the cement mixed soil. While there are several methods for measuring cement content, the hydrochloric acid heat reaction (HAHR) method is easiest and quickest and is relatively high in precision to measure the cement content in fresh concrete. However, to apply HAHR to the fresh soil cement, there were many questions about a test condition. This study investigated conditions to apply the HAHR method to cement mixed soil. At first, cement are mixed to the local soil samples in the ratio of 0 to 10g/100g. Initial temperatures (T0) of the mixed soil and hydrochloric acid are measured. 100 g of mixed soil is put in an insulated container. 100mL of hydrochloric acid is added, and reaction temperature (T1) is measured. Relationship of temperature rise (T1-T0) and cement content is a calibration graph. The relation is proportional. And, the temperature rises are measured about 100g of cement mixed soil of the site. Its cement content is obtained using the calibration curve. It is optimal to use 6M hydrochloric acid for this method. It is necessary to examine it with local soil and local cement to prepare a calibration curve. When the water content ratio of the soil greatly changes, it is necessary for the calibration curve to be updated. HAHR tests are done in 10 to 60 minutes after having mixed soil and cement in the case of samples containing a little water. But, in the case of containing much water, the tests are done under the specified elapsed time. As an example of the result, the cement content of soil can be determined from the rising temperature of the sample soil.

AB - The mixing cement with soft soil to increase their strength has been used in many construction sites and it is important that soil and cement are well mixed. In order to evaluate the mixing accuracy during construction, it may be required to measure the cement content by sampling the cement mixed soil. While there are several methods for measuring cement content, the hydrochloric acid heat reaction (HAHR) method is easiest and quickest and is relatively high in precision to measure the cement content in fresh concrete. However, to apply HAHR to the fresh soil cement, there were many questions about a test condition. This study investigated conditions to apply the HAHR method to cement mixed soil. At first, cement are mixed to the local soil samples in the ratio of 0 to 10g/100g. Initial temperatures (T0) of the mixed soil and hydrochloric acid are measured. 100 g of mixed soil is put in an insulated container. 100mL of hydrochloric acid is added, and reaction temperature (T1) is measured. Relationship of temperature rise (T1-T0) and cement content is a calibration graph. The relation is proportional. And, the temperature rises are measured about 100g of cement mixed soil of the site. Its cement content is obtained using the calibration curve. It is optimal to use 6M hydrochloric acid for this method. It is necessary to examine it with local soil and local cement to prepare a calibration curve. When the water content ratio of the soil greatly changes, it is necessary for the calibration curve to be updated. HAHR tests are done in 10 to 60 minutes after having mixed soil and cement in the case of samples containing a little water. But, in the case of containing much water, the tests are done under the specified elapsed time. As an example of the result, the cement content of soil can be determined from the rising temperature of the sample soil.

KW - Cement content

KW - Dissolution heat

KW - Hydrochloric acid

KW - Soil

KW - Temperature

UR - http://www.scopus.com/inward/record.url?scp=85058436948&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85058436948&partnerID=8YFLogxK

U2 - 10.21660/2018.52.8143

DO - 10.21660/2018.52.8143

M3 - Article

VL - 15

SP - 177

EP - 183

JO - International Journal of GEOMATE

JF - International Journal of GEOMATE

SN - 2186-2982

IS - 52

ER -