Abbas et al. (2016) — Ultra-High Performance Concrete: Mechanical Performance, Durability, Sustainability and Implementation Challenges

Citation

Abbas, S., Nehdi, M. L., & Saleem, M. A. (2016). Ultra-High Performance Concrete: Mechanical Performance, Durability, Sustainability and Implementation Challenges. International Journal of Concrete Structures and Materials, 10(3), 271–295.

DOI: 10.1007/s40069-016-0157-4
Atlas layer: context / comparative
Related Victor Li book chapter: Chapter 1: Introduction and Background (Classification of High-Performance Fiber Reinforced Cementitious Composites: UHPC vs. ECC) & Chapter 11: Applications and Future Trends
Source PDF: abbas-2016-ultra-high-performance-concrete-mechanical.pdf
Extracted text: full_text/abbas-2016-ultra-high-performance-concrete-mechanical_full_text.md
Source note: source_notes/abbas-2016-ultra-high-performance-concrete-mechanical_source_note.md

Why this paper matters

Provides a comprehensive state-of-the-art review and database on Ultra-High Performance Concrete (UHPC), serving as an essential comparative benchmark for the ECC Research Atlas to contrast UHPC (high compressive strength, steel fibers, high particle packing density) with ECC (micromechanically designed extreme tensile ductility, PVA/PE fibers, crack width control).

Main contribution

Synthesizes international experimental databases on UHPC mixture proportions, curing regimes (standard water, steam curing at 90 °C, autoclaving at 200 °C), and fiber reinforcement parameters (straight, hooked, twisted steel fibers, 1–6 vol. %).
Establishes mechanical performance envelopes: compressive strength typically 150–250 MPa, direct tensile strength 7–15 MPa, flexural strength 15–40 MPa, and high fracture energy ($G_F$ up to 20,000–40,000 J/m²).
Evaluates durability indicators (chloride permeability, carbonation, freeze-thaw, sulfate resistance) and life-cycle sustainability aspects compared to conventional concrete.
Identifies critical implementation hurdles: high initial material cost, lack of contractor experience, and need for standardized structural design provisions.

Evidence summary

Compressive Strength Profile: Standard cured UHPC achieves 150–180 MPa; steam curing (90 °C) elevates strength to 180–220 MPa; autoclaving (200 °C) exceeds 250 MPa (Section 3.1).
Direct Tensile & Flexural Behavior: Direct tensile strength ranges from 7 to 15 MPa with post-cracking strain-hardening up to ~0.2–0.6 % strain (significantly lower than ECC's 2–8 % tensile strain capacity), while flexural strength reaches 20–45 MPa (Section 3.2, Table 3).
Fiber Mechanisms: High-strength straight/twisted micro-steel fibers ($l_f/d_f \approx 60\text{--}100$) provide high pullout resistance and fracture energy, distinct from polymer fiber bridging in ECC.
Durability Performance: Negligible rapid chloride permeability (< 100 Coulombs), ultra-low water absorption (< 0.1 %), and superior freeze-thaw resistance (durability factor > 100 % after 600 cycles) due to ultra-dense microstructure without coarse aggregates (Section 4).

Linked Atlas nodes

02_concepts/material_classification.md
02_concepts/tensile_ductility_vs_compressive_strength.md
04_material_systems/uhpc_vs_ecc_comparison.md
05_experiments/direct_tensile_test.md
02_concepts/life_cycle_analysis.md

Relationship to Victor Li book

Primary book anchor: Victor C. Li (2019), Engineered Cementitious Composites (ECC).
Connects to Chapter 1 (pp. 3–15), where Victor Li differentiates HPFRCC/UHPC (characterized by high strength, high matrix fracture toughness $K_m$, and steel fiber pullout) from ECC (designed via micromechanics with low matrix toughness and controlled fiber-matrix interface for $J_b'/J_{tip} \ge 3$ and steady-state multiple cracking).
Provides quantitative baselines showing that while UHPC excels in compressive strength (> 150 MPa), its tensile strain capacity (< 0.5 %) remains an order of magnitude lower than ductile ECC (2–8 %).

Claim-evidence rows to add

Atlas node	Claim	Evidence summary	Page/Figure/Table	Status
`02_concepts/tensile_ductility_vs_compressive_strength.md`	UHPC achieves ultra-high compressive strength (150–250 MPa) via dense particle packing, but tensile strain capacity remains limited (< 0.6 %) compared to ECC	Comprehensive database shows $f_c = 150\text{--}250\text{ MPa}$ and direct tensile strain $\approx 0.2\text{--}0.6\%$ with steel fibers	Section 3, Table 3	verified_from_pdf
`04_material_systems/uhpc_vs_ecc_comparison.md`	Heat curing regimes (steam at 90 °C / autoclaving at 200 °C) accelerate pozzolanic reactions in UHPC, densifying C-S-H and boosting strength	Steam curing accelerates silica fume pozzolanic reaction, increasing 28d $f_c$ from ~160 MPa to > 200 MPa	Section 3.1.2, Fig. 5	verified_from_pdf
`02_concepts/life_cycle_analysis.md`	High embodied carbon of UHPC due to high cement content (800–1000 kg/m³) can be mitigated by structural member cross-section reduction and supplementary cementitious materials (fly ash, slag, silica fume)	30–40 % cement replacement by FA/GGBS maintains $f_c > 150\text{ MPa}$ while reducing environmental footprint	Section 2.1, Section 5	verified_from_pdf

Verification status

PDF preserved: yes (abbas-2016-ultra-high-performance-concrete-mechanical.pdf)
Text extracted: yes (full_text/abbas-2016-ultra-high-performance-concrete-mechanical_full_text.md)
DOI verified: yes (10.1007/s40069-016-0157-4)
Metadata verified: yes (IJCSM, Vol. 10, No. 3, pp. 271–295, 2016)
Claim-evidence matrix ready: yes

Cautions

Do not classify UHPC as ECC: UHPC uses high fiber modulus (steel fibers) in a very dense, high fracture toughness matrix, failing to satisfy ECC steady-state flat cracking criteria.
Always distinguish direct tensile strain capacity ($\le 0.5\%$) from flexural deflection ductility.