What question did this study set out to answer?

This research aims to evaluate the effectiveness of using foam glass lightweight materials for insulation in pavement structures.

February 22, 2026Japanese Journal of JSCE0 citations

Evaluation on Heat Insulation Performance of Foam Glass Lightweight Gravels by Field Test and Heat Tranfer Analysis

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KMKeita MATSUDA SKShinichiro KAWABATA MSMasanori SUGAWARA

Key Points

This research aims to evaluate the effectiveness of using foam glass lightweight materials for insulation in pavement structures.
Conducted field tests to assess heat insulation performance.
Performed heat transfer analysis to determine thermal conductivity.
Reused waste glass bottles to create foam glass lightweight material for testing.
Field tests showed that replacing the lower subgrade with lightweight material did not reach the lower layer during freezing.
The lightweight material demonstrated insulating properties.
Heat transfer analysis indicated thermal conductivity was about one-fourth that of commonly used crushed stone.

Abstract

2023年度版の舗装標準示方書には，道路の凍上対策として路床の一部を非凍上性材料に置換える置換工法に加え，断熱工法が標準工法として記載された．このことから，様々な現場条件に応じた凍上対策工法の選定が可能となった．本研究は，廃ガラス瓶を再利用したガラス発泡軽量材を舗装構造に用いた断熱工法の有効性を現地試験と熱伝導解析により評価したものである．現地試験結果から，下層路盤下部を軽量材で置換えた場合の凍結深さは下部層まで達していないことから，軽量材は断熱性能を有していると考えられる．また，熱伝導解析からは，軽量材はxpsほどではないものの，置換工法で一般的に用いられる切込砕石の1/4程度の熱伝導率を有していることが確認できた．

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Cite This Study

MATSUDA et al. (2025) studied this question.

synapsesocial.com/papers/699a9cc6482488d673cd27b8 https://doi.org/10.2208/jscejj.25-21040

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February 22, 2026Japanese Journal of JSCE0 citations

Evaluation on Heat Insulation Performance of Foam Glass Lightweight Gravels by Field Test and Heat Tranfer Analysis

View Full Paper

KMKeita MATSUDA SKShinichiro KAWABATA MSMasanori SUGAWARA

Key Points

This research aims to evaluate the effectiveness of using foam glass lightweight materials for insulation in pavement structures.
Conducted field tests to assess heat insulation performance.
Performed heat transfer analysis to determine thermal conductivity.
Reused waste glass bottles to create foam glass lightweight material for testing.
Field tests showed that replacing the lower subgrade with lightweight material did not reach the lower layer during freezing.
The lightweight material demonstrated insulating properties.
Heat transfer analysis indicated thermal conductivity was about one-fourth that of commonly used crushed stone.

Abstract

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View Full Paper

Cite This Study

MATSUDA et al. (2025) studied this question.

synapsesocial.com/papers/699a9cc6482488d673cd27b8 https://doi.org/10.2208/jscejj.25-21040

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