This collection consists of ten papers that were presented by ACI Committee 236 at the ACI Spring convention in Chicago, IL, in 2010. Topics include Characterization of the Nanostructure and Microstructure of Concrete, Cracking Reduction, Incorporating Nanofibers into Concrete Mixtures,and Material Behavior Reinforced with Examinations at the Microstructural Level.


Contents:

SP-270-1

Study of Cement Paste Setting at Microstructural Level

by G. Venkiteela and Z. Sun

SP-270-2

X-Ray Nanotomography of Cement Microstructure

by D. A. Lange, Y. Jia, and Y.-S. Liu

SP-270-3

Closed-Form Solutions for Uniaxial Passive Restraint Experiments

by Z. C. Grasley

SP-270-4

Applications of Electrical Impedance Methods in Linking Structure of Micro- and Macro-Porous Concretes to Their Transport Properties

by N. Neithalath and J. Jain

SP-270-5

Improvement of Fresh-State Concrete through Small Additions of Clay

by N. Tregger, R. Ferron, M. Beacraft, J. H. Kim, K. Kuder, and S. P. Shah

SP-270-6

Cement-Based Materials Characterization at Nanoscale: Nanoindentation and Ultrasonic Atomic Force Microscopy (AFM)

by J. H. Kim, P. Mondal, and S. P. Shah

SP-270-7

Monitoring Chemical Shrinkage Using Pressure Sensors

by S. Peethamparan, E. Weissinger, J. Vocaturo, J. Zhang, and G. Scherer

SP-270-8

Internal Curing: Discussion of the Role of Pore Solution on Relative Humidity Measurements and Desorption of Lightweight Aggregate (LWA)

by J. Castro, P. Lura, F. Rajabipour, R. Henkensiefken, and J. Weiss

SP-270-9

Quantifying Damage Due to Aggregate Expansion in Cement Matrix

by M. Pour-Ghaz and J. Weiss

This CD-ROM consists of seven papers that were presented at a session sponsored by ACI Committee 341 at the ACI Fall Convention in St. Louis, MO, in November 2008. The papers focus on the most recent advancements in performance-based seismic design of reinforced concrete bridges, including analytical and experimental studies, and design and construction practices with relevant information related to reinforced concrete bridges based on performance-based design.