Subtopic Deep Dive
Hygrothermal Performance of Rammed Earth
Research Guide
What is Hygrothermal Performance of Rammed Earth?
Hygrothermal performance of rammed earth examines coupled heat and moisture transfer in rammed earth walls, including thermal conductivity, vapor permeability, and moisture buffering capacity.
Researchers characterize these properties through experimental tests and numerical modeling under varying climates. Key studies report 161 citations for Hamard et al. (2016) on cob earth processes and 117 citations for Giuffrida et al. (2019) literature review. Over 10 papers from 2007-2023 analyze stabilization effects and in-situ measurements.
Why It Matters
Rammed earth enables sustainable construction with low embodied energy and indoor climate regulation (Giuffrida et al., 2019; Hamard et al., 2016). In-situ measurements show energy savings in walls (Soudani et al., 2016, 90 citations). Stabilization reduces hygroscopic performance, impacting durability assessments (Arrigoni et al., 2017, 99 citations). These properties optimize energy-efficient buildings in vernacular designs (Fernandes et al., 2019, 87 citations).
Key Research Challenges
Stabilization Impact on Hygroscopy
Stabilization with cement or lime reduces moisture buffering in rammed earth (Arrigoni et al., 2017, 99 citations). Experiments show decreased hygroscopic performance under low stabilizer contents (Ouedraogo et al., 2019, 86 citations). Balancing stability and moisture regulation remains unresolved.
In-Situ Measurement Accuracy
Long-term field data reveals variability in thermal performance due to climate (Soudani et al., 2016, 90 citations). Procedures for hygrothermal monitoring face sensor placement issues (Chabriac et al., 2014, 30 citations). Integrating ageing effects complicates predictions (Bui and Morel, 2014, 32 citations).
Coupled Heat-Moisture Modeling
Numerical simulations require accurate material parameters for heat-air-moisture transfer (Schijndel, 2007, 89 citations). Recent reviews highlight gaps in earth material databases (Fabbri et al., 2018, 61 citations). Validation against weathering demands refined frameworks (Beckett et al., 2020, 103 citations).
Essential Papers
Cob, a vernacular earth construction process in the context of modern sustainable building
Erwan Hamard, Bogdan Cazacliu, Andry Razakamanantsoa et al. · 2016 · Building and Environment · 161 citations
Hygrothermal Properties of Raw Earth Materials: A Literature Review
Giada Giuffrida, Rosa Caponetto, Francesco Nocera · 2019 · Sustainability · 117 citations
Raw earth historic and contemporary architectures are renowned for their good environmental properties of recyclability and low embodied energy along the production process. Earth massive walls are...
Weathering the storm: A framework to assess the resistance of earthen structures to water damage
Chris Beckett, Paul Jaquin, Jean‐Claude Morel · 2020 · Construction and Building Materials · 103 citations
Reduction of rammed earth's hygroscopic performance under stabilisation: an experimental investigation
Alessandro Arrigoni, Anne‐Cécile Grillet, Renato Pelosato et al. · 2017 · Building and Environment · 99 citations
Energy evaluation of rammed earth walls using long term in-situ measurements
Lucile Soudani, Monika Woloszyn, Antonin Fabbri et al. · 2016 · Solar Energy · 90 citations
Integrated heat air and moisture modeling and simulation
van Awm Jos Schijndel · 2007 · Data Archiving and Networked Services (DANS) · 89 citations
An overall objective of our work is to improve building and systems performances in terms of durability, comfort and economics. In order to predict, improve and meet a certain set of performance re...
Passive strategies used in Southern Portugal vernacular rammed earth buildings and their influence in thermal performance
Jorge Fernandes, Ricardo Mateus, Helena Gervásio et al. · 2019 · Renewable Energy · 87 citations
Reading Guide
Foundational Papers
Start with Schijndel (2007, 89 citations) for heat-air-moisture modeling basics, then Bui and Morel (2014, 32 citations) on rammed earth ageing, and Chabriac et al. (2014, 30 citations) for in-situ hygrothermal procedures.
Recent Advances
Study Giuffrida et al. (2019, 117 citations) literature review, Beckett et al. (2020, 103 citations) weathering framework, and Fabbri et al. (2018, 61 citations) performance assessments.
Core Methods
Core techniques include in-situ monitoring (Soudani et al., 2016), experimental stabilization tests (Arrigoni et al., 2017), and integrated simulation models (Schijndel, 2007).
How PapersFlow Helps You Research Hygrothermal Performance of Rammed Earth
Discover & Search
Research Agent uses searchPapers and exaSearch to find 250M+ papers on rammed earth hygrothermal properties, revealing Arrigoni et al. (2017) as a 99-citation hub. citationGraph maps connections from Hamard et al. (2016) to stabilization studies. findSimilarPapers expands from Giuffrida et al. (2019) review to 117+ related works.
Analyze & Verify
Analysis Agent applies readPaperContent to extract hygrothermal data from Soudani et al. (2016), then runPythonAnalysis with NumPy/pandas to plot thermal conductivity vs. moisture content. verifyResponse (CoVe) and GRADE grading check model accuracy against Schijndel (2007) simulations. Statistical verification confirms stabilization effects in Arrigoni et al. (2017).
Synthesize & Write
Synthesis Agent detects gaps in stabilization-moisture tradeoffs across Arrigoni et al. (2017) and Ouedraogo et al. (2019), flagging contradictions. Writing Agent uses latexEditText, latexSyncCitations for rammed earth performance reports, and latexCompile for publication-ready PDFs. exportMermaid generates hygrothermal transfer diagrams from Fabbri et al. (2018).
Use Cases
"Analyze hygrothermal data from rammed earth in-situ measurements"
Research Agent → searchPapers (Soudani et al. 2016) → Analysis Agent → readPaperContent + runPythonAnalysis (pandas plot of energy data) → matplotlib graphs of thermal performance over time.
"Write LaTeX report comparing stabilized vs unstabilized rammed earth"
Synthesis Agent → gap detection (Arrigoni et al. 2017 vs Ouedraogo et al. 2019) → Writing Agent → latexEditText + latexSyncCitations + latexCompile → PDF with cited hygrothermal comparisons.
"Find GitHub code for rammed earth moisture modeling"
Research Agent → paperExtractUrls (Schijndel 2007) → Code Discovery → paperFindGithubRepo + githubRepoInspect → Verified simulation scripts for heat-air-moisture transfer.
Automated Workflows
Deep Research workflow conducts systematic review of 50+ rammed earth papers: searchPapers → citationGraph → structured report on hygrothermal trends from Hamard et al. (2016). DeepScan applies 7-step analysis with CoVe checkpoints to verify Arrigoni et al. (2017) data against in-situ tests. Theorizer generates moisture buffering theories from Giuffrida et al. (2019) and Fabbri et al. (2018).
Frequently Asked Questions
What defines hygrothermal performance of rammed earth?
It covers coupled heat and moisture transfer, thermal conductivity, vapor permeability, and buffering in rammed earth walls, studied via experiments and modeling (Giuffrida et al., 2019).
What are key methods for assessment?
In-situ measurements track long-term behavior (Soudani et al., 2016; Chabriac et al., 2014), while numerical models simulate transfer (Schijndel, 2007). Experimental tests quantify stabilization effects (Arrigoni et al., 2017).
What are influential papers?
Hamard et al. (2016, 161 citations) on cob processes; Giuffrida et al. (2019, 117 citations) review; Arrigoni et al. (2017, 99 citations) on stabilization.
What open problems exist?
Ageing under weathering (Beckett et al., 2020), accurate in-situ protocols (Chabriac et al., 2014), and comprehensive material databases for modeling (Fabbri et al., 2018).
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