Claudia Romero RodriguezDelft University of Technology | TU · Department of Structural Engineering
Claudia Romero Rodriguez
PhD Candidate
About
27
Publications
11,730
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439
Citations
Citations since 2017
Introduction
Additional affiliations
March 2017 - present
August 2016 - March 2017
MgAubel
Position
- Junior Materials Specialist
August 2015 - January 2016
Education
October 2013 - March 2016
September 2011 - October 2013
Publications
Publications (27)
Several methods have been proposed in the last years to evaluate the self-healing properties of concrete, and despite intense efforts towards standardization in RILEM committees and several research projects, no standards have been released yet. In the framework of COST Action SARCOS, an Interlaboratory Test (ILT) was organized to advance this topi...
Concrete structures perform poorly when withstanding thermal shock events, usually requiring repair or replacement after one single instance. In certain industries (such as petrol, metallurgic and ceramics), these events are not only likely but frequent, which represents a considerable financial burden. One option to solve this issue would be to de...
Industries such as metal, ceramics and petrochemicals suffer from high temperature spills. Such events exert a unique form of loading in concrete structures that cannot be accurately simulated by heating of samples in an oven. Calcium aluminate cement (CAC) based concrete is the industry standard for such environment, and while much is known regard...
![Fig. 16. Schematic of the sample and the crack [50].](profile/Claudia-Romero-Rodriguez/publication/357539825/figure/fig4/AS:1108303350366211@1641251518735/Schematic-of-the-sample-and-the-crack-50_Q320.jpg)
Lattice models have been used to simulate mass transport to predict durability of cementitious materials. In particular, the use of dual lattice meshes allows for the coupling of fracture and transport processes, which commonly occur at the same time in these materials. Literature has shown good agreement between simulations and experimental result...
Since self-healing of cementitious materials can theoretically improve the service-life of concrete structures, it has gathered significant attention from both researchers and industry during the last two decades. Many researchers have proposed different methods to assess and quantify the self-healing capacity (i.e. the ability of cementitious mate...
![Fig. 1. Schematic diagram of sample preparation [22].](profile/Yidong-Gan/publication/351345895/figure/fig1/AS:1020046373552128@1620209415150/Schematic-diagram-of-sample-preparation-22_Q320.jpg)
A R T I C L E I N F O Keywords: Strain rate sensitivity Micro-cantilever bending Cement paste Creep A B S T R A C T This study presents an experimental investigation of the rate-dependent mechanical properties of cement paste at the microscale. With the use of a nanoindenter, micro-cantilever beams with the size of 300 μm × 300 μm × 1650 μm were lo...
This paper presents a method to numerically investigate the microstructural effect on the creep behavior of cement paste at the microscale. The lattice fracture model is extended to consider local time‐dependent deformations of calcium‐silicate‐hydrate phases in the cement paste by imposing local forces. The term “experimentally informed model” is...
For many 3D printed cementitious materials, air voids may play a dominant role in the interlayer bond strength. However, to date, far too little attention has been paid to reveal the air void characteristics in 3D printed cementitious materials. Therefore, to fill this gap, this study attempts to provide an example of systematically characterizing...
In this study, the interface between different types of bacteria-embedded self-healing polylactic acid capsules (PLA) and cement paste is investigated. Particularly, the changes in microstructure and mechanical properties of the interface with respect to bulk cement paste were studied. First, nanoindentation was performed to obtain maps of hardness...
For a single batch material, time intervals and nozzle standoff distances between two subsequent layers are two critical printing parameters that influence the mechanical performance of the printed concrete. This paper presents an experimental and numerical study to investigate the impacts of these printing parameters on the interlayer bond strengt...
This study explores the effects of different types of nanoparticles, namely nano-SiO2 (NS), nano-TiO2 (NT), and nano-Fe2O3 (NF) on the fresh properties, mechanical properties, and microstructure of cement mortar containing fly ash as a supplementary cementitious material. These nanoparticles existed in powder form and were incorporated into the mor...
This study aims to investigate the influences of different grades of calcined clay on 3D printability, compressive strength (7 days), and hydration of limestone and calcined clay-based cementitious materials. Calcined clays that contained various amounts of metakaolin were achieved by blending low-grade calcined clay (LGCC) and high- grade calcined...
Recent studies have shown that concrete containing Phase Change Materials (PCM) with low transition temperatures may reduce the number of freeze/thaw cycles suffered by the cementitious composite in temperate climates. Nevertheless, the positive influence of such admixtures on the frost resistance of cement-based materials has not been directly sho...
![Mix design summary in [kg/m 3 ].](profile/Claudia-Romero-Rodriguez/publication/341371546/figure/tbl1/AS:891026952683520@1589448788020/Mix-design-summary-in-kg-m-3_Q320.jpg)
Extrusion based additive manufacturing of cementitious materials has demonstrated strong potential to become widely used in the construction industry. However, the use of this technique in practice is conditioned by a feasible solution to implement reinforcement in such automated process. One of the most successful ductile materials in civil engine...
![Figure 2. Micro-beam specimens placed on a 3D-printed support, after [24].](profile/Claudia-Romero-Rodriguez/publication/341030221/figure/fig2/AS:885741563437057@1588188653738/Micro-beam-specimens-placed-on-a-3D-printed-support-after-24_Q320.jpg)
Carbonation of hydrated cement paste (HCP) causes numerous chemo-mechanical changes in the microstructure, e.g. porosity, strength, elastic modulus and permeability, which have significant influence on the durability of concrete structures. Due to its complexity, much is still not understood about the process of carbonation of HCP. The current stud...
Superabsorbent Polymers (SAP) have been recently subject of investigation as smart admixtures for cement-based materials. The properties of these polymers enable their use for internal curing, increasing freeze/thaw resistance, boosting autogenous self-healing and providing a crack self-sealing effect in cementitious composites. Except for the earl...
Recently the concept of crack self-sealing has been investigated as a method to prevent degradation and/or loss of functionality of cracked concrete elements. To obtain self-sealing effect in the crack, water swelling admixtures such as superabsorbent polymers (SAP) are added into the cementitious mix. In order to design such self-sealing systems i...
New additive manufacturing methods for cementitious materials hold a high potential to increase automation in the construction industry. However, these methods require new materials to be developed that meet performance requirements related to specific characteristics of the manufacturing process. The appropriate characterization methods of these m...
SLD4 is a conference on Service Life Design for Infrastructures which is jointly organised by
Delft University and Tongji University as part of the RILEM week 2018 in Delft, The Netherlands.
The conference builds on the success of the previous three events on this topic held in Shanghai
(2006), Delft (2010) and Zhuhai (2014). Service Life Design fo...
CONMOD2018 is a symposium on Concrete Modelling which is jointly organised by Delft University
and Ghent University as part of the RILEM week 2018 in Delft, The Netherlands.
The symposium is the 5th in a series dealing with all aspects concerning modelling of concrete at various
scales.
The symposium consist of 3 key-note papers and 62 regular pape...
The ability of Superabsorbent Polymers (SAP) to block water flow through cracks in cement-based materials has become an attractive feature of these admixtures. The diminution of flow rates in such composites is attributed to the capacity of the SAPs to absorb water and swell in the crack, but little work has been done to indicate one or the other c...
CONMOD2018 is a symposium on Concrete Modelling which is jointly organised by Delft University and Ghent University as part of the RILEM week 2018 in Delft, The Netherlands. The symposium is the 5th in a series dealing with all aspects concerning modelling of concrete at various scales. The symposium consist of 3 key-note papers and 62 regular pape...
SLD4 is a conference on Service Life Design for Infrastructures which is jointly organised by Delft University and Tongji University as part of the RILEM week 2018 in Delft, The Netherlands. The conference builds on the success of the previous three events on this topic held in Shanghai (2006), Delft (2010) and Zhuhai (2014). Service Life Design fo...
Projects
Projects (2)
Development of concrete reinforced with bitumen-coated steel fibers to neutralize water ingress in the cracked concrete through the healing action of induction heating.
The overall goal of the project is to develop modeling tools to study and optimize different self-healing mechanisms for concrete.
Specifically,
-the healing action of super absorbent polymers (SAP) in mortar/concrete,
-the use of mineral admixtures that react within the crack upon water uptake,
-the implementation of self-healing BFSC mortar/concrete(s) subjected to freeze and thaw cycles by combining the use of phase change materials (PCM) and mineral admixtures,
-the precipitation of calcium carbonate within Bacterial Concrete,
-the study of generic healing mechanisms of concrete where capsules and fibers are used to contain the healing agent and the tailoring of specific ones,
Will be the foci of the project through numerical modeling of the individual mechanisms and experimental simulations. As well as the modeling of the fracture mechanics of the studied self-healing materials that in some cases have a proactive role on the mechanism functioning itself.
